Accurate Arms #7 in the .45 Colt
Posted: Mon Sep 18, 2006 8:31 pm
I've got a pile of data on using Accurate Arms #2 and #5 in the .45 Colt, but almost nothing on #7, and I strongly believe it would be a great powder for the .45 Colt if used in moderation.
Being a slower burning powder than #2 or #5, all I'm seeking is just a little bit better loading density in the case. I'm not interested in "magnumizing" this round.
I'm only seeking 850-900 fps with a 255 gr. Keith-style lead SWC. I'm already getting those velocities with #2 and #5, but I'm a bit fearful of the pressures I may be generating with those faster-burning powders with their sharper pressure curves.
Moreover, with those powders, I'm getting Extreme Spreads and Standard Deviations that I'm not willing to settle for. And I'm definitely not satisfied with 2.5-3" groups at 25 yards.
My handloads for my 9mm Hi-Power routinely produce SD numbers of well under 10.0 for either a 125 gr. LRN or a 115 gr. JHP (1060 fps and 1250 fps respectively). And my routine handloads for the .45 ACP produce an average SD of between 10.89 and 12.12 with either a 225 gr. LRN or a 185 gr. JHP (810 fps and 1070 fps respectively). I get sub-1-inch groups at 25 yards with my loads for both these cartridges in my guns.
Before anyone suggests Unique, forget it, unless the new manufacturer has figured how to make it burn cleaner (I've complained about Unique on this site many times before).
Someone else suggested I look at Blue Dot, but I can't find any data for it.
And I do have a couple of really old loading manuals from the late '60s and early '70s that have loads for 2400, but I'm scared stiff of trying those, even though they're listed separately from those loads intended for the Blackhawk or Contender.
Any and all suggestions are welcome with my gratitude.
Allen
Being a slower burning powder than #2 or #5, all I'm seeking is just a little bit better loading density in the case. I'm not interested in "magnumizing" this round.
I'm only seeking 850-900 fps with a 255 gr. Keith-style lead SWC. I'm already getting those velocities with #2 and #5, but I'm a bit fearful of the pressures I may be generating with those faster-burning powders with their sharper pressure curves.
Moreover, with those powders, I'm getting Extreme Spreads and Standard Deviations that I'm not willing to settle for. And I'm definitely not satisfied with 2.5-3" groups at 25 yards.
My handloads for my 9mm Hi-Power routinely produce SD numbers of well under 10.0 for either a 125 gr. LRN or a 115 gr. JHP (1060 fps and 1250 fps respectively). And my routine handloads for the .45 ACP produce an average SD of between 10.89 and 12.12 with either a 225 gr. LRN or a 185 gr. JHP (810 fps and 1070 fps respectively). I get sub-1-inch groups at 25 yards with my loads for both these cartridges in my guns.
Before anyone suggests Unique, forget it, unless the new manufacturer has figured how to make it burn cleaner (I've complained about Unique on this site many times before).
Someone else suggested I look at Blue Dot, but I can't find any data for it.
And I do have a couple of really old loading manuals from the late '60s and early '70s that have loads for 2400, but I'm scared stiff of trying those, even though they're listed separately from those loads intended for the Blackhawk or Contender.
Any and all suggestions are welcome with my gratitude.
Allen