24" 284 win velocities

[dragman]

Depends on gun but it is possible. Take it slow i move .2 grains at a time. And .284's are known to go from no pressure signs to blowing primers within a couple tenths.

 

[barnesuser28]

Thanks for the advice!

 

[glo]

My numbers using Load From A Disc based on an MV of 2700fps show: 57.0 grains H4831; load density of 104.1%; peak pressure of 55,000cup (65478psi). This using a 180 grain Berger VLD with a seating depth of .603”, COAL of 3.100” from a 24” barrel.

This would be considered an over pressured load, beyond SAAMI specs. SAAMI for a .284 Winchester Pmax for the average individual is 54,000cup (63,962psi).

For the above individual at 54,000cup (63,962psi) would be an MV of 2676; 56.4 grains H4831 and a load density of 103.2% with same bullet, seating depth, COAL and barrel.

COAL with 180 grain berger will be 3.275 touching the lands.

Good Afternoon Barnesuser28,

I redid the numbers for you. I set the bullet back .010” as touching would increased the pressure to an unknown quantity. So... With my numbers using Load From A Disc based on; a COAL of 3.265”; Pmax for the average individual at 54,000cup (63,962psi); 180 grain Berger VLD with a seating depth of .438” and 24” barrel, here is the results. I also added in H4350. MV of 2706; 59.3 grains H4831 and a load density of 103.4% and MV of 2711; 54.6 grains H4350 and a load density of 95.3%.

Personally, I still don't think you will get as high as 2700fps with safe pressure. If you have a strain gauge setup that would give you the definitive answer on pressure. Just remember to back off if you start getting head expansion of .0005”, sticky bolt or flattening primer.

Let us know how it goes.

P.S. Here is the numbers for R17. MV of 2711; 54.8 grains R17 and a load density of 95.7%. No change in velocity at 54,000cup.

 

[barnesuser28]

Good Afternoon Barnesuser28,

I redid the numbers for you. I set the bullet back .010” as touching would increased the pressure to an unknown quantity. So... With my numbers using Load From A Disc based on; a COAL of 3.265”; Pmax for the average individual at 54,000cup (63,962psi); 180 grain Berger VLD with a seating depth of .438” and 24” barrel, here is the results. I also added in H4350. MV of 2706; 59.3 grains H4831 and a load density of 103.4% and MV of 2711; 54.6 grains H4350 and a load density of 95.3%.

Personally, I still don't think you will get as high as 2700fps with safe pressure. If you have a strain gauge setup that would give you the definitive answer on pressure. Just remember to back off if you start getting head expansion of .0005”, sticky bolt or flattening primer.

Let us know how it goes.

P.S. Here is the numbers for R17. MV of 2711; 54.8 grains R17 and a load density of 95.7%. No change in velocity at 54,000cup.

Thank you very much glo! I will probably try h4350 first for its lower density, and to see how my gun likes it, if it doesnt shoot 1/3 MOA or better i will give h4831 a try. Again thank you very much!

 

[yukonal]

I'm at 2845 with 56.0 gr 4831 SC in a 25" bbl. So, if you can fit 56.5 and seat a 168 VLD, you'll get there.

My accuracy is at 53.5, and 55.5. It opens up after that. Haven't chrono'ed the 180's yet, but I will this weekend.

 

[barnesuser28]

My numbers using Load From A Disc based on an MV of 2700fps show: 57.0 grains H4831; load density of 104.1%; peak pressure of 55,000cup (65478psi). This using a 180 grain Berger VLD with a seating depth of .603”, COAL of 3.100” from a 24” barrel.

This would be considered an over pressured load, beyond SAAMI specs. SAAMI for a .284 Winchester Pmax for the average individual is 54,000cup (63,962psi).

For the above individual at 54,000cup (63,962psi) would be an MV of 2676; 56.4 grains H4831 and a load density of 103.2% with same bullet, seating depth, COAL and barrel.

COAL with 180 grain berger will be 3.275 touching the lands.

Good Afternoon Barnesuser28,

I redid the numbers for you. I set the bullet back .010” as touching would increased the pressure to an unknown quantity. So... With my numbers using Load From A Disc based on; a COAL of 3.265”; Pmax for the average individual at 54,000cup (63,962psi); 180 grain Berger VLD with a seating depth of .438” and 24” barrel, here is the results. I also added in H4350. MV of 2706; 59.3 grains H4831 and a load density of 103.4% and MV of 2711; 54.6 grains H4350 and a load density of 95.3%.

Personally, I still don't think you will get as high as 2700fps with safe pressure. If you have a strain gauge setup that would give you the definitive answer on pressure. Just remember to back off if you start getting head expansion of .0005”, sticky bolt or flattening primer.

Let us know how it goes.

P.S. Here is the numbers for R17. MV of 2711; 54.8 grains R17 and a load density of 95.7%. No change in velocity at 54,000cup.

glo, can you please run these again this time with a 26" barrel and use a 162 grain A-Max at 3.185" which would be at the lands so 3.175'' EDIT: with H4350.

Thanks, Riley

 

[barnesuser28]

Can anyone run those #'s for me?

 

[barnesuser28]

pretty pretty please?? ;D

 

[barnesuser28]

Would still like these # ran from anyone please.

 

[Steve Blair]

Attached is the load table for H4350 and the parameters you provided. You should get a copy of QuickLOAD. It is invaluable to me when reloading.

 

[barnesuser28]

Thank you very much Steve, so if i am understanding correctly, 54 grains would be the MAX they list? I will definatly look into quickload, what version do you have and how much does it cos
Thanks again,
Riley

 

[Steve Blair]

54.0 may not be max, but is close. Your gun may show pressure earlier than that. Start 10% down and run a pressure series to see where your limits are. When you find the limit, back off and work up in smaller increments. I work in .1 grain increments to identify the sweet spot. [br]
QuickLOAD ~$160 and available from Neco at the following URL: [br]
http://www.neconos.com/details3.htm

 

[barnesuser28]

Here are my charge weights that i am going to try. Lapua brass, fed 215 match primer, 162 amax, .025 off the lands. Shoot round robin:
Three rounds at 52 grains, three at 52.2 grains, three at 52.4 grains, three at 52.6 grains, three at 52.8 grains, three at 53 grains, three at 53.2 grains, three at 53.4 grains, three at 53.6 grains, three at 53.8 grains, three at 54 grains, three at 54.2 grains, three at 54.4 grains, three at 54.6 grains, three at 54.8 grains.

The reason i am shooting 3 shots is to give me an idea on ES and see where my sweet spot for accuracy is. And of course, i will stop doing the round robin when i get some pressure signs.

 

[Steve Blair]

Sounds like a reasonable plan.

 

[barnesuser28]

I will let you know how it goes, i will have the gun back in 3-4 weeks then probably another week for my uncle to bed it. Then off to the range!

 

[barnesuser28]

The weather was finally decent enough to go shooting, 75 degrees infact (and yes i did get sunburned ). I did the shoot and clean 10 times and i wasnt making a whole lot of progress on the cleaning. I then did shoot 5 and clean (3 times) and it really started to improve in cleaning time, then 15 shots and clean (twice) and it was cleaning up pretty good. Four, 3 minute soaks with Bore tech CU+2 and she was clean by the end. I used a mild load of 50 grains of H4350 (please dont come and steal any , and i should hit pressure around 54 grain FYI ) with the 162 grain amaxs that i threw together and it was shooting about .75 moa with the 5 shot groups and about 1.75 MOA groups with the 15 shot groups from a shaky bench , being fatigued from being in the sun all day, and 10-20 mph wind. The loads were running about 2730 fps the first few shots then the wind picked up to about 20 mph and knocked the chrony over.... twice, then i was able to get it stand and not fall over (i told it to stay there in a soft soothing voice ) and it went to about 2670 fps average at the last 15 rounds.

Riley