Quote:
Originally Posted by Jerry Harlow
I just picked some loads using Cheddite hulls which are readily available in new primed form from the two sources. Remembering that Bismuth is lighter than lead, I feel that the few more grains of Longshot delivering the shot at perhaps 100 fps faster would give the same penetration as lead, since Bismuth will not have quite the killing power. Longshot I have found is a very dirty burning powder, perhaps not burning completely, and maybe the reason for heavier charges in the Cheddite hull which I use it with, as compared to the WWAA hull using less powder but a hotter primer. I think the recoil since both are 1 1/4 ounce loads would be negligible and unnoticed, but that is a decision for the shooter.
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The slowest load you posted was at 1350 fps, that will produce 22% more recoil than an 1 1/4 ounce load going 1250. At 1400 fps recoil is 32% greater. That is a significant difference that both the gun and shooter have to absorb, one is going to feel it. Bismuth does act like lead and velocity is the enemy of tight patterns, in addition bismuth is more brittle and pellets have been known to shatter further reducing effectiveness. The old timers knew to increase killing power at longer range you increase the mass of the pellet, it still works today. I have been shooting bismuth reloads in 12 and 10 gauge for about 25 years with good effect. Loads moving at 1150 to 1250 work great with the proper shot size, I found there is no need to beat up a gun and shoulder with a higher velocity. I have never concerned myself with whether a powder is dirty or not unless I am shooting a gas automatic.