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Looking for some Quickload help for a .444 Marlin

MQ1

Folks,

Please help me with a big bore. I’m looking for some help with determining basic Min and Max loads for a 325gr gas checked hard cast bullet for a 1-20 twist 22” Marlin lever action.

I know...not your typical request on accurate shooter...

I’m specifically looking for starting loads with H4895 or Varget, and imr 3031 if possible.

Best Regards,

MQ1
 
My QL bullet database doesn't show any 325 grainers in 0.430" or 0.429" size.

Heaviest .430 or .429" bullet in my database is 310 gr and then 410 gr.

----------------------------------------------------------------------------------
This data is for the 310 gr LEE bullet....
----------------------------------------------
Cartridge : .444 Marlin
Bullet : .430, 310, LEE C430-310-RF
Useable Case Capaci: 54.006 grain H2O = 3.507 cm³
Cartridge O.A.L. L6: 2.600 inch = 66.04 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Hodgdon H4895

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 85 42.40 1626 1820 18175 3416 73.3 1.805
-18.0 87 43.46 1671 1922 19507 3555 74.9 1.747
-16.0 89 44.52 1716 2027 20938 3692 76.5 1.691
-14.0 92 45.58 1762 2136 22469 3829 78.0 1.638
-12.0 94 46.64 1807 2248 24111 3963 79.5 1.587
-10.0 96 47.70 1853 2364 25875 4096 81.0 1.537
-08.0 98 48.76 1899 2483 27769 4226 82.4 1.490
-06.0 100 49.82 1945 2605 29806 4354 83.8 1.445
-04.0 102 50.88 1992 2730 31999 4479 85.1 1.401
-02.0 104 51.94 2038 2859 34362 4600 86.4 1.359
+00.0 106 53.00 2085 2992 36911 4717 87.6 1.318
+02.0 109 54.06 2132 3127 39664 4830 88.8 1.279
+04.0 111 55.12 2178 3267 42643 4938 89.9 1.241
+06.0 113 56.18 2225 3409 45870 5042 91.0 1.205 ! Near Maximum !
+08.0 115 57.24 2273 3555 49374 5139 92.0 1.170 ! Near Maximum !
+10.0 117 58.30 2320 3705 53183 5231 93.0 1.136 !DANGEROUS LOAD-DO NOT USE!
--------------------------------------------------------------------------------

Cartridge : .444 Marlin
Bullet : .430, 310, LEE C430-310-RF
Useable Case Capaci: 54.006 grain H2O = 3.507 cm³
Cartridge O.A.L. L6: 2.600 inch = 66.04 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Hodgdon VARGET

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 88 42.40 1571 1699 18162 3108 69.7 1.825
-18.0 90 43.46 1614 1793 19462 3238 71.3 1.768
-16.0 92 44.52 1657 1889 20852 3367 72.8 1.713
-14.0 95 45.58 1700 1988 22340 3496 74.3 1.661
-12.0 97 46.64 1743 2091 23933 3624 75.8 1.610
-10.0 99 47.70 1787 2197 25637 3752 77.2 1.561
-08.0 101 48.76 1831 2307 27471 3878 78.7 1.515
-06.0 103 49.82 1875 2420 29436 4002 80.0 1.469
-04.0 106 50.88 1919 2536 31548 4125 81.4 1.426
-02.0 108 51.94 1964 2655 33820 4245 82.7 1.384
+00.0 110 53.00 2009 2779 36267 4363 84.0 1.343
+02.0 112 54.06 2054 2905 38909 4478 85.2 1.304
+04.0 114 55.12 2100 3036 41743 4590 86.4 1.267
+06.0 117 56.18 2146 3170 44852 4698 87.6 1.230 ! Near Maximum !
+08.0 119 57.24 2192 3307 48204 4801 88.7 1.195 ! Near Maximum !
+10.0 121 58.30 2238 3449 51847 4901 89.8 1.160 !DANGEROUS LOAD-DO NOT USE!
-----------------------------------------------------------------------

Cartridge : .444 Marlin
Bullet : .430, 310, LEE C430-310-RF
Useable Case Capaci: 54.006 grain H2O = 3.507 cm³
Cartridge O.A.L. L6: 2.600 inch = 66.04 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : IMR 3031

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 88 40.80 1614 1793 17192 3530 78.8 1.841
-18.0 90 41.82 1660 1897 18428 3677 80.6 1.782
-16.0 92 42.84 1707 2005 19751 3821 82.4 1.724
-14.0 94 43.86 1754 2117 21166 3962 84.1 1.670
-12.0 96 44.88 1800 2231 22681 4099 85.7 1.617
-10.0 99 45.90 1848 2349 24304 4231 87.3 1.566
-08.0 101 46.92 1895 2471 26045 4359 88.8 1.518
-06.0 103 47.94 1942 2595 27913 4481 90.1 1.471
-04.0 105 48.96 1989 2723 29920 4597 91.4 1.426
-02.0 107 49.98 2036 2853 32076 4706 92.7 1.383
+00.0 110 51.00 2083 2987 34397 4808 93.8 1.341
+02.0 112 52.02 2130 3123 36899 4903 94.8 1.301
+04.0 114 53.04 2177 3262 39598 4990 95.8 1.263
+06.0 116 54.06 2224 3404 42516 5068 96.6 1.225
+08.0 118 55.08 2270 3548 45673 5138 97.4 1.189 ! Near Maximum !
+10.0 121 56.10 2317 3695 49095 5199 98.0 1.155 ! Near Maximum !
----------------------------------------------------------------------------

If you measure the length of the bullet I can adjust this data to be closer to a 325 gr bullet. Your COAL would be good to know as well.

Otherwise a reduction of 1 or 2 grains would be sufficient.
 
Zero,

Thanks for taking the time to build the data for me, it is exactly what I was looking for to start.

The finished bullet length is .902

The COAL is 2.515

I had a semi-custom 325gr mold made for me by mountain man molds, and I know there is relatively few commercial molds of that size and larger in that caliber.

I also happen to have the Lee 310 mold that I got for a song, so I’ll have to pour some and give them a whirl too.

Many thanks!

MQ1
 
When I get home later today I'll run the #'s with the 325 gr and correct COAL.

Longer bullets seated deeper inside the case generate more pressure.
 
First column = Step %
Second column = Case fill % (107% is still ok when pouring the powder slowly into case, above 107% is compressed load)
Third = Charge weight in Grains
Fourth = Velocity in FPS
Fifth = Energy in Ft-lbs
Sixth = Chamber Pressure in PSI
Seventh = Muzzle Pressure in PSI
Eighth = Powder burn %
Ninth = Barrel time in milliseconds.
-------------------------------------------------------------------
Cartridge : .444 Marlin
Bullet : .430", 325 gr Custom (0.902")
Useable Case Capaci: 45.522 grain H2O = 2.956 cm³
Cartridge O.A.L. L6: 2.515 inch = 63.88 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon H-4895

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 88 36.80 1514 1653 17129 2572 71.0 2.039
-18.0 90 37.72 1556 1747 18390 2678 72.6 1.974
-16.0 92 38.64 1598 1843 19744 2783 74.2 1.912
-14.0 94 39.56 1641 1942 21197 2887 75.7 1.852
-12.0 96 40.48 1683 2045 22759 2991 77.2 1.794
-10.0 99 41.40 1726 2151 24438 3093 78.7 1.739
-08.0 101 42.32 1770 2260 26247 3193 80.1 1.685
-06.0 103 43.24 1813 2372 28197 3291 81.5 1.634
-04.0 105 44.16 1857 2487 30302 3388 82.9 1.585
-02.0 107 45.08 1900 2606 32575 3482 84.2 1.538
+00.0 110 46.00 1944 2728 35037 3573 85.5 1.492
+02.0 112 46.92 1989 2854 37704 3661 86.7 1.448
+04.0 114 47.84 2033 2983 40602 3746 87.9 1.405
+06.0 116 48.76 2078 3115 43753 3827 89.0 1.364
+08.0 118 49.68 2122 3251 47189 3904 90.1 1.325 ! Near Maximum !
+10.0 121 50.60 2167 3390 50945 3976 91.1 1.286 !DANGEROUS LOAD-DO NOT USE!
---------------------------------------------------------------------

Cartridge : .444 Marlin
Bullet : .430", 325 gr Custom (0.902")
Useable Case Capaci: 45.522 grain H2O = 2.956 cm³
Cartridge O.A.L. L6: 2.515 inch = 63.88 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon VARGET

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 92 37.20 1482 1585 17841 2382 68.3 2.033
-18.0 94 38.13 1522 1672 19143 2481 69.8 1.969
-16.0 96 39.06 1563 1762 20545 2581 71.3 1.908
-14.0 98 39.99 1604 1856 22047 2680 72.8 1.850
-12.0 101 40.92 1645 1952 23662 2779 74.3 1.793
-10.0 103 41.85 1686 2052 25400 2877 75.7 1.739
-08.0 105 42.78 1728 2155 27270 2974 77.1 1.687
-06.0 108 43.71 1770 2261 29289 3069 78.5 1.636
-04.0 110 44.64 1812 2371 31467 3164 79.9 1.588
-02.0 112 45.57 1855 2484 33824 3256 81.2 1.541
+00.0 115 46.50 1898 2600 36378 3347 82.5 1.496
+02.0 117 47.43 1942 2720 39153 3435 83.8 1.452
+04.0 119 48.36 1985 2844 42169 3521 85.0 1.410
+06.0 121 49.29 2029 2971 45457 3604 86.2 1.369 ! Near Maximum !
+08.0 124 50.22 2073 3103 49053 3684 87.3 1.329 ! Near Maximum !
+10.0 126 51.15 2118 3238 52994 3760 88.5 1.291 !DANGEROUS LOAD-DO NOT USE!
---------------------------------------------------------------------------

Cartridge : .444 Marlin
Bullet : .430", 325 gr Custom (0.902")
Useable Case Capaci: 45.522 grain H2O = 2.956 cm³
Cartridge O.A.L. L6: 2.515 inch = 63.88 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : IMR 3031

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 93 36.40 1547 1728 17547 2779 78.2 2.007
-18.0 95 37.31 1592 1829 18849 2894 80.1 1.941
-16.0 97 38.22 1637 1934 20248 3007 81.9 1.878
-14.0 100 39.13 1683 2043 21752 3117 83.6 1.817
-12.0 102 40.04 1728 2155 23370 3223 85.2 1.759
-10.0 104 40.95 1774 2270 25111 3326 86.8 1.704
-08.0 107 41.86 1819 2389 26990 3425 88.3 1.650
-06.0 109 42.77 1865 2511 29014 3519 89.7 1.599
-04.0 111 43.68 1911 2636 31209 3608 91.0 1.549
-02.0 114 44.59 1957 2764 33577 3691 92.2 1.501
+00.0 116 45.50 2003 2895 36154 3769 93.4 1.456
+02.0 118 46.41 2049 3029 38947 3840 94.4 1.411
+04.0 121 47.32 2095 3166 41987 3905 95.4 1.369
+06.0 123 48.23 2141 3307 45301 3962 96.3 1.328 ! Near Maximum !
+08.0 125 49.14 2186 3449 48925 4012 97.1 1.288 ! Near Maximum !
+10.0 128 50.05 2232 3595 52896 4055 97.8 1.250 !DANGEROUS LOAD-DO NOT USE!
-----------------------------------------------------------------------------------------
 
My take on this is that these 3 powders are a bit too slow burning for this application.

Out of those 3 powders I would only consider using H-4895 because it's a very good and stable powder for reduced loads.

If you're only looking to keep this bullet around 2,000 fps, I think H-4198 or Vihtavouri N-125 might be most suitable because it will fully burn, fill the case with out compression, and get 2,000 fps at near MAX charge weight.

I've used H-4895 in reduced loads and surprisingly it burned clean at very low chamber pressures.
 
Cartridge : .444 Marlin
Bullet : .430", 325 gr Custom (0.902")
Useable Case Capaci: 45.522 grain H2O = 2.956 cm³
Cartridge O.A.L. L6: 2.515 inch = 63.88 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Vihtavuori N125

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 82 32.00 1734 2170 25169 2722 98.1 1.720
-18.0 84 32.80 1771 2264 26959 2775 98.7 1.672
-16.0 86 33.60 1808 2359 28863 2823 99.1 1.626
-14.0 88 34.40 1844 2454 30890 2867 99.5 1.582
-12.0 90 35.20 1880 2550 33033 2907 99.7 1.540
-10.0 92 36.00 1915 2646 35303 2941 99.9 1.500
-08.0 94 36.80 1950 2743 37709 2971 100.0 1.462
-06.0 96 37.60 1984 2840 40260 2996 100.0 1.426
-04.0 98 38.40 2017 2937 42966 3021 100.0 1.391
-02.0 101 39.20 2051 3035 45837 3045 100.0 1.358 ! Near Maximum !
+00.0 103 40.00 2083 3132 48884 3068 100.0 1.326 ! Near Maximum !
+02.0 105 40.80 2116 3230 52121 3090 100.0 1.295 !DANGEROUS LOAD-DO NOT USE!
-----------------------------------------------------------------------------

Cartridge : .444 Marlin
Bullet : .430", 325 gr Custom (0.902")
Useable Case Capaci: 45.522 grain H2O = 2.956 cm³
Cartridge O.A.L. L6: 2.515 inch = 63.88 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon H-4198

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 83 32.80 1659 1986 25066 2576 86.6 1.756
-18.0 85 33.62 1697 2079 26800 2654 87.8 1.707
-16.0 87 34.44 1736 2174 28643 2731 88.9 1.659
-14.0 89 35.26 1774 2271 30603 2805 89.9 1.614
-12.0 92 36.08 1812 2370 32682 2878 90.9 1.571
-10.0 94 36.90 1850 2470 34902 2947 91.9 1.529
-08.0 96 37.72 1888 2572 37249 3015 92.7 1.489
-06.0 98 38.54 1926 2676 39745 3079 93.6 1.451
-04.0 100 39.36 1963 2781 42403 3141 94.4 1.414
-02.0 102 40.18 2001 2888 45236 3199 95.1 1.379 ! Near Maximum !
+00.0 104 41.00 2038 2997 48257 3254 95.8 1.345 ! Near Maximum !
+02.0 106 41.82 2075 3107 51482 3306 96.4 1.312 !DANGEROUS LOAD-DO NOT USE!
 
Zero333 said:
My take on this is that these 3 powders are a bit too slow burning for this application.

Out of those 3 powders I would only consider using H-4895 because it's a very good and stable powder for reduced loads.

If you're only looking to keep this bullet around 2,000 fps, I think H-4198 or Vihtavouri N-125 might be most suitable because it will fully burn, fill the case with out compression, and get 2,000 fps at near MAX charge weight.

I've used H-4895 in reduced loads and surprisingly it burned clean at very low chamber pressures.
Click to expand...

I agree wholeheartedly. I wanted H4895 specifically for the reduced load, which I’ve tested at 40gr just to see how much this rifle kicks on the low end. Turned out pretty accurate, which made me pretty happy.

I’ve also come into about 10 lbs of old (but still good) imr3031, which I figured would be good for some mild plinking loads.

I really have hopes for the full load 325gr with H4895 as dependable elk and bigger game load. I’m not terribly interested in wringing the last ounce of speed out of this load because Lord knows it will probably kick enough at the upper end.

Thanks for your data and suggestions! I’ll be sure to post up my results when I get them.

Best Regards,

MQ1
 
Zero333 said:
My take on this is that these 3 powders are a bit too slow burning for this application.

Out of those 3 powders I would only consider using H-4895 because it's a very good and stable powder for reduced loads.

If you're only looking to keep this bullet around 2,000 fps, I think H-4198 or Vihtavouri N-125 might be most suitable because it will fully burn, fill the case with out compression, and get 2,000 fps at near MAX charge weight.

I've used H-4895 in reduced loads and surprisingly it burned clean at very low chamber pressures.
Click to expand...


If you could, could you run the numbers with H4198? I have a bunch for my 20 Vartarg and could easily run some tests with that too.

MQ1
 
Zero333 said:
Cartridge : .444 Marlin
Bullet : .430", 325 gr Custom (0.902")
Useable Case Capaci: 45.522 grain H2O = 2.956 cm³
Cartridge O.A.L. L6: 2.515 inch = 63.88 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Vihtavuori N125

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 82 32.00 1734 2170 25169 2722 98.1 1.720
-18.0 84 32.80 1771 2264 26959 2775 98.7 1.672
-16.0 86 33.60 1808 2359 28863 2823 99.1 1.626
-14.0 88 34.40 1844 2454 30890 2867 99.5 1.582
-12.0 90 35.20 1880 2550 33033 2907 99.7 1.540
-10.0 92 36.00 1915 2646 35303 2941 99.9 1.500
-08.0 94 36.80 1950 2743 37709 2971 100.0 1.462
-06.0 96 37.60 1984 2840 40260 2996 100.0 1.426
-04.0 98 38.40 2017 2937 42966 3021 100.0 1.391
-02.0 101 39.20 2051 3035 45837 3045 100.0 1.358 ! Near Maximum !
+00.0 103 40.00 2083 3132 48884 3068 100.0 1.326 ! Near Maximum !
+02.0 105 40.80 2116 3230 52121 3090 100.0 1.295 !DANGEROUS LOAD-DO NOT USE!
-----------------------------------------------------------------------------

Cartridge : .444 Marlin
Bullet : .430", 325 gr Custom (0.902")
Useable Case Capaci: 45.522 grain H2O = 2.956 cm³
Cartridge O.A.L. L6: 2.515 inch = 63.88 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon H-4198

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 83 32.80 1659 1986 25066 2576 86.6 1.756
-18.0 85 33.62 1697 2079 26800 2654 87.8 1.707
-16.0 87 34.44 1736 2174 28643 2731 88.9 1.659
-14.0 89 35.26 1774 2271 30603 2805 89.9 1.614
-12.0 92 36.08 1812 2370 32682 2878 90.9 1.571
-10.0 94 36.90 1850 2470 34902 2947 91.9 1.529
-08.0 96 37.72 1888 2572 37249 3015 92.7 1.489
-06.0 98 38.54 1926 2676 39745 3079 93.6 1.451
-04.0 100 39.36 1963 2781 42403 3141 94.4 1.414
-02.0 102 40.18 2001 2888 45236 3199 95.1 1.379 ! Near Maximum !
+00.0 104 41.00 2038 2997 48257 3254 95.8 1.345 ! Near Maximum !
+02.0 106 41.82 2075 3107 51482 3306 96.4 1.312 !DANGEROUS LOAD-DO NOT USE!
Click to expand...

Haha...thanks for running the numbers ahead of my request...didn’t see the data before I posted my question.

Many thanks!

MQ1
 
I'm happy to help. As long as you understand that Quickload is no different than a reloading manual. It's a guide to start somewhere and good old reading pressure signs and a chronograph always trump any other data.

Anytime you want me to run some recipes in Quickload just PM me. It takes 10 seconds to run some #'s.
 
Zero333 said:
I'm happy to help. As long as you understand that Quickload is no different than a reloading manual. It's a guide to start somewhere and good old reading pressure signs and a chronograph always trump any other data.

Anytime you want me to run some recipes in Quickload just PM me. It takes 10 seconds to run some #'s.
Click to expand...

I fully understand, and appreciate the offer. I somehow have fallen into the wildcat and odd caliber habit, and I like to do my homework before I just start stuffing cases...

Thanks again, Zero!

MQ1
 
sharps618 said:
I dont know if this helps or not but, a custom mold maker has Quikload .bul files available covering a 0.434" 324gn cast bullet. Not sure of your application but thought I would put it out there:

http://www.noebulletmolds.com/NOEquickload.zip

Quikload is new to me, but casting isnt.


Pete
Click to expand...
Thanks Sharps...I load and cast more than I care to admit, but I don’t own quickload at this time, so I’m not sure if the files would help me as much as the data Zero so selflessly shared. I will follow up with the NOE site...I know they make good molds too!

MQ1
 
MQ1 said:
Thanks Sharps...I load and cast more than I care to admit, but I don’t own quickload at this time, so I’m not sure if the files would help me as much as the data Zero so selflessly shared. I will follow up with the NOE site...I know they make good molds too!

MQ1
Click to expand...
I would share the files, but got Quikload for a Xmas gift, not quite sure how to share the files either. But will help if you need it.
 
sharps618 said:
I would share the files, but got Quikload for a Xmas gift, not quite sure how to share the files either. But will help if you need it.
Click to expand...

Play around with QL for a while before you start sharing data.
Once you get a good hang of it you'll frolic around for hours at a time.
 
Zero333 said:
Play around with QL for a while before you start sharing data.
Once you get a good hang of it you'll frolic around for hours at a time.
Click to expand...


Zero,

I’m curious. My mold drop my boolits at .432 and I lube/size them at .432...does that change the data much? I see you have the bullet at .430

MQ1
 
MQ1 said:
Zero,

I’m curious. My mold drop my boolits at .432 and I lube/size them at .432...does that change the data much? I see you have the bullet at .430

MQ1
Click to expand...

Changing diameter from .430 to .432 increases the pressure almost 2,000 psi. Not enough to matter.
Difference in primer brand can have more of an affect on chamber pressure than 0.002" of bullet diameter.
 
Zero333 said:
Changing diameter from .430 to .432 increases the pressure almost 2,000 psi. Not enough to matter.
Difference in primer brand can have more of an affect on chamber pressure than 0.002" of bullet diameter.
Click to expand...

Awesome...I figured as much, but it is more fun to actually know!

Thanks again,

MQ1
 
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