Reloader 25 in a 284 win?

[its only light]

Has anybody tried reloader 25 in the 284? Or maybe this combination won't work? I saw load data for reloader 25 with 180 grain vld bullets in the 7mm SAUM so I'm wondering if it would work in a 284 with the same bullets. Reason I ask is I used to use rl-25 in my 338 lapua and have changed to rl-33 so I have a bunch of the 25 left over and I just finished my 284 build. Thanks in advance for any comments or advice!

 

[jsimonh]

If the burn rate is close to h1000 I'm not sure you could get enough in the case to be any better than 4831 or r17. You could always try it and let us know. I'd be very interested in the results.

 

[its only light]

I think your right about the burn rate, it is close to h1000. I will give it a go and let you know. Any suggestions on a starting point?

 

[Laurie]

I've no direct experience, but here's what QuickLOAD predicts with the 180gn Berger VLD at 3.100-inch COAL from a 30-inch barrel and using the program's default case capacity value.

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

-02.7 104 54.46 2781 3090 49845 8154 100.0 1.534
-02.5 104 54.62 2788 3107 50315 8163 100.0 1.528
-02.2 104 54.77 2795 3123 50788 8171 100.0 1.521
-01.9 105 54.92 2803 3139 51267 8180 100.0 1.515
-01.6 105 55.08 2810 3156 51752 8189 100.0 1.509
-01.4 105 55.23 2817 3172 52239 8197 100.0 1.503
-01.1 105 55.38 2824 3189 52733 8206 100.0 1.497
-00.8 106 55.54 2832 3205 53233 8214 100.0 1.491
-00.5 106 55.69 2839 3222 53737 8222 100.0 1.485
-00.3 106 55.85 2846 3238 54247 8231 100.0 1.479 ! Near Maximum !
+00.0 107 56.00 2854 3255 54761 8239 100.0 1.472 ! Near Maximum !
+00.3 107 56.15 2861 3271 55281 8247 100.0 1.466 ! Near Maximum !
+00.5 107 56.31 2868 3288 55808 8255 100.0 1.460 ! Near Maximum !
+00.8 107 56.46 2875 3304 56341 8263 100.0 1.455 ! Near Maximum !
+01.1 108 56.62 2883 3321 56877 8271 100.0 1.449 ! Near Maximum !
+01.4 108 56.77 2890 3338 57421 8279 100.0 1.443 ! Near Maximum !


56gn Re25 is calculated at 106.6% fill-ratio at this COAL and case capacity and is running at an estimated 54,761 psi PMax. On that basis, it appears you wouldn't be able to get enough Re25 in a standard 284W case to achieve full working pressures approaching 60,000 psi.

Modelling the combination in the rather larger .280 Rem Ackley Imp shows the powder might just work there with this bullet, but only if the barrel is throated to suit it and giving a COAL of no less than 3.500-inches. 62.5gn is calculated to still be compressed, but not ridiculously so with a fill-ratio of 103.7% and PMax is ~the 59,000 psi level for an estimated 2,962 fps MV.

 

[its only light]

Thanks for the information. Big help!