45 Colt-454 Casull-460 S&W
Depending on your cylinder length, you may have to crimp over the front driving band.
There is NO way you're going prevent this bullet from backing out of the case in a full cylinder under full recoil. There's simply not enough friction to keep it in place. Work up your loads to determine what you can get away with. At the very least, it is a great reduced load bullet.
Freedom Arms will only chamber .451" bullets.
45 cal. SWC 340 gr. .451"-.452"