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Posted: 2/18/2013 12:46:24 PM EDT
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As most are doing, I'm shooting whatever I can come up with. Procured a pound of BL-C(2) and looking for accuracy load for 1:8 16" Wylde chamber and 20" 1:9 Wylde chamber. Hodgdon test barrel is 24" 1:12 so no help there! Sierra AR-15 manual only has a load for 52 & 53 gr Match Kings (25.8 - 26.6 gr) - nothing for other weights. I also have 55, 60, 62, 68 & 69 gr bullets. Can someone please put me in the ball park for some of these other bullets? Anyone have an idea why the BL-C(2) range is less than a grain for the 52 and 53 gr Sierra?
I did find that dryflash posted in 2011, 26.0 gr BL-C(2) behind a 62 gr steel core and called it a max load. 2 MOA @ 100 yds with pulled bullets. Thanks for the help! |
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Shooting from a faster twist doesn't matter. What is safe from a 1 in 12 will be safe frome a 1 in 7, just start with the start loads and work up like normal. Same for barrel length. They have data for heavier bullets.
You're not going to find data for the exact combination of everything you're using. |
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Hornady (Sixth Edition, using a 26" Rem 700 with 1-12 twist) shows a starting load of 24.4 grains and a max load of 28.1 grains.
I get good accuracy with Hornady 55 gr FMJs in my 1-9 twist 20" varmint barrel at 27.0 grains of BL-C(2) and 27.5 grains is about where I start to get indications of excess pressure. The 27.5 grains gives near M193 velocity and shoots well in my 20" SP1 and M16A1 upper. I'd recommend starting at 25 grains and working up from there however, as bullet bearing surfaces differ as do chambers, throats and bores. And, even though it's canister grade powder, lots a vary a bit and you may not be able to get the max load in your rifle at safe pressures. In terms of M193 velocities, H335 is closer to WC846, but I can usually squeeze a bit more velocity out of 55 gr Hornady FMJs with BL-C(2) than I can with H335. ---- The other accuracy load in my notes for my 20" varmint AR is 23.5 gr of IMR 4895. |
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Quoted:
Hornady (Sixth Edition, using a 26" Rem 700 with 1-12 twist) shows a starting load of 24.4 grains and a max load of 28.1 grains. I get good accuracy with Hornady 55 gr FMJs in my 1-9 twist 20" varmint barrel at 27.0 grains of BL-C(2) and 27.5 grains is about where I start to get indications of excess pressure. The 27.5 grains gives near M193 velocity and shoots well in my 20" SP1 and M16A1 upper. I'd recommend starting at 25 grains and working up from there however, as bullet bearing surfaces differ as do chambers, throats and bores. And, even though it's canister grade powder, lots a vary a bit and you may not be able to get the max load in your rifle at safe pressures. In terms of M193 velocities, H335 is closer to WC846, but I can usually squeeze a bit more velocity out of 55 gr Hornady FMJs with BL-C(2) than I can with H335. ---- The other accuracy load in my notes for my 20" varmint AR is 23.5 gr of IMR 4895. Thanks DakotaFAL, I'm looking more for accuracy - looks as if I just better start at about 25.5 for 55 gr and maybe 24.5 for 68 gr. |
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Quoted: Correct, be sure to work up to that load. I had pressure signs at 26.5 grs in my rifle, so I dropped down .5 grs.As most are doing, I'm shooting whatever I can come up with. Procured a pound of BL-C(2) and looking for accuracy load for 1:8 16" Wylde chamber and 20" 1:9 Wylde chamber. Hodgdon test barrel is 24" 1:12 so no help there! Sierra AR-15 manual only has a load for 52 & 53 gr Match Kings (25.8 - 26.6 gr) - nothing for other weights. I also have 55, 60, 62, 68 & 69 gr bullets. Can someone please put me in the ball park for some of these other bullets? Anyone have an idea why the BL-C(2) range is less than a grain for the 52 and 53 gr Sierra? I did find that dryflash posted in 2011, 26.0 gr BL-C(2) behind a 62 gr steel core and called it a max load. 2 MOA @ 100 yds with pulled bullets. Thanks for the help! I ended up loading the FMJBT, Hornady 55 gr SP bullet with the same charge. I was at 26.5 grs but got tired of changing the PM all the time. Still shot great. Used the same charge with 52/53 gr bullets, was a higher charge, don't have my notes in front of me right now. When I loaded heavier bullets than 62 grs, I used other powders.
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Quoted:
Shooting from a faster twist doesn't matter. What is safe from a 1 in 12 will be safe frome a 1 in 7, just start with the start loads and work up like normal. Same for barrel length. They have data for heavier bullets. You're not going to find data for the exact combination of everything you're using. Appreciate your help DR61007. I was fishing for folks with direct experience so as to maximize the use of my frugal powder reserves - and Dryflash3 replied with his experience - so I now have what I need. |
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