Thread: compressed loads

@silentscope
I tried ar2225 and struggled to get 70gr into the winchester and federal cases I was using.
I was using 2213sc before that and the case wasn't full. Have you tried 2213sc?

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Sako .270 Shortmag, 24" barrel, Norma cases, 150 Berger VLD, 62gn2213, fed 210, 20thou off :3050fps average, maybe a powder change before trying compression.

The term "compression" is a little misleading, all you are really doing is reducing the air space between grains, vibration of the case to settle the powder is useful, as is a drop tube - if you were to actually compress the powder charge to beyond 100%, the granules would fracture exposing the explosive charge under the coating, the coating controls the rate of burn, if enough fracturing occurred, you would have a dangerous situation indeed!

If 150 grain pills at 3k is not enough for you, maybe you have the wrong calibre, you are not going to get a great deal more, and another 100fps will not make a significant difference in 600yd drop, velocity or striking energy. Worth noting that a .308 load of 46gns 2208 under a 165 SST doing 2700fps, will drop animals at 600yds if you can shoot at that distance.

Originally Posted by puku

@silentscope
I tried ar2225 and struggled to get 70gr into the winchester and federal cases I was using.
I was using 2213sc before that and the case wasn't full. Have you tried 2213sc?

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not yet, ill have a look for some next time im at the shop. how much you using? what are you getting from it?

Originally Posted by 257weatherby

Sako .270 Shortmag, 24" barrel, Norma cases, 150 Berger VLD, 62gn2213, fed 210, 20thou off :3050fps average, maybe a powder change before trying compression.

The term "compression" is a little misleading, all you are really doing is reducing the air space between grains, vibration of the case to settle the powder is useful, as is a drop tube - if you were to actually compress the powder charge to beyond 100%, the granules would fracture exposing the explosive charge under the coating, the coating controls the rate of burn, if enough fracturing occurred, you would have a dangerous situation indeed!

If 150 grain pills at 3k is not enough for you, maybe you have the wrong calibre, you are not going to get a great deal more, and another 100fps will not make a significant difference in 600yd drop, velocity or striking energy. Worth noting that a .308 load of 46gns 2208 under a 165 SST doing 2700fps, will drop animals at 600yds if you can shoot at that distance.

yes i dont want to start making grenades haha, shooting that distance is no issue but im worried my bullets will start lacking in hitting power, and also i am trying to see if it will shoot a bit flatter for futher as my scope dosent dial as high as most due to its zero stop pin. if a i know for sure it has more energy than a 308 at that range. just ideas i want to try i guess.

Originally Posted by silentscope

not yet, ill have a look for some next time im at the shop. how much you using? what are you getting from it?

I have changed barrels and calibre now. I can have a look in my book tomorrow and see what the load is. If I don't use the ar2213sc for the 7-300wsm would you like it? It's about half full

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Originally Posted by puku

I have changed barrels and calibre now. I can have a look in my book tomorrow and see what the load is. If I don't use the ar2213sc for the 7-300wsm would you like it? It's about half full

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yeah mate that would be bloody awesome

Originally Posted by silentscope

yes i dont want to start making grenades haha, shooting that distance is no issue but im worried my bullets will start lacking in hitting power, and also i am trying to see if it will shoot a bit flatter for futher as my scope dosent dial as high as most due to its zero stop pin. if a i know for sure it has more energy than a 308 at that range. just ideas i want to try i guess.

My .270 Win (different rifle) has a Weaver Grand Slam 3-10x40, 140 Berger VLD at 2900fps zero'd +3 at 110yds gets me out to 320yds (-4") using the top of the bottom post, I get out to 460yds ( -4"), not hard to dial a little extra from there if needed, without running out of scope, as long as it "dials" consistently, in my case, that would be 12 clicks,( my scope is half per, not quarter ). Maybe practice using the post and dial from there, but if you really need to shoot at that distance all the time, get REALLY GOOD at judging drift. We practice those shots on milk jugs (to equate minute of animal), not paper, at the required distance, spotting for each other to get it right, and the barrel is kept cold (no multiple shots, cold fouled barrel).

Hodgon reloading has 70g as the max with 63000psi. I personally would rather a safe accurate load that was 100fps slower, than run it flat out.
Greg

Originally Posted by silentscope

im wanting to get more from my rounds, but to get more from my loads i need to start compressing the powder (the book also says this). now how much can i compress the powder? can i do it to the point where the bullet will no longer seat to the correct depth? or is this too much?

cheers again

Dont.