The high velocity when hitting a forcing cone is a good point. However, the S&W 460 uses gain rifling, where it starts out straight and then starts to spin and increases twist. Suppose that's in order to keep the 454 Casull rounds from doing that in the longer chamber? And if so, would that possibly be a solution for a 410 version?
Of course with all the wadding typically in shotshells, a 410 short that's the length of the 460 Smith may be the way to go. Perhaps even make a 460 shot shell that's more than just rat shot, and that's loaded somewhere in between 460 and 410 pressures, whatever works best. Perhaps even design it not to spread too far due to the rifling.
I thought a while back that a levergun chambered for 410 and a similar length rifle cartridge would be great, and would also be able to take 454 or even just 45 Colt. But the practicality of the 410 in a heavy duty long gun that can also take 45 Colt isn't so much.
Of course with all the wadding typically in shotshells, a 410 short that's the length of the 460 Smith may be the way to go. Perhaps even make a 460 shot shell that's more than just rat shot, and that's loaded somewhere in between 460 and 410 pressures, whatever works best. Perhaps even design it not to spread too far due to the rifling.
I thought a while back that a levergun chambered for 410 and a similar length rifle cartridge would be great, and would also be able to take 454 or even just 45 Colt. But the practicality of the 410 in a heavy duty long gun that can also take 45 Colt isn't so much.
