I am loading for 41 and 44 magnums and 45 Colts.
• In the velocity range of 1,000 to 1,150 fps, which powders are easiest on plain based lead bullets?
• Which powders have the lowest flame temps and cause the least amount of leading in the barrel?
I know that matching bullet sizing to cylinder throats is the best way to limit leading, but want to understand more about powder effects as well. THANK YOU
For the calibers you list I have had excellent results using HS 6, AA 5, 7, and 9. They all meter wonderful and give top end performance up into the true magnum loads.
I pour my own and have found that a BHN of between 12 and 14 does great. I load for calibers ranging from 9mm up through 454 Casull and don't use anything harder than air cooled wheel weights. My velocities run anywhere from a low end 825fps 45acp, up to over 1600 with some plain based 280gr solids in the 454.
As some will attest, loading cast is usually a balancing act where you try to match the alloy, lube, size, and pressure. You can usually get by fudging on one but not by much. The size and lube are really the top considerations. It has been said size is king and lube is queen.
There has been a mountain of information about the proper ways for shooting cast bullets. One of the best laid out compilations can be found here
LASC Article Index Glen Fryxell has put down a ton of information and is very knowledgeable about just about every aspect to make it all come together.
I highly suggest spending a little time reading through
some of the topics there and even downloading Glens PDF book.