357 mag taper vs roll crimp

[Paul5388]

I don't use a roll crimp on anything and don't have any problems with bullet movement regardless of the caliber I'm using. Here's some .45 ACP and AR that are at least a step above normal loads and they don't have a roll crimp.

Once you get beyond 50 yards, using a rifle, you can see the improvement in accuracy you get with a taper crimp vs a roll crimp.

There isn't any roll crimp on these .360 DWs and .357s used in a rifle and accuracy is improved.

Here's a 100 yard group shot with the pictured loads.

 

[buck460XVR]

I use a roll crimp in my magnum revolvers for all of the formentioned reasons, plus I've found that powders like H110/W296, 2400 and Lil' Gun shoot more consistently with a firm crimp.