The difference is case length.
It is basically like 38 special and 357.
I have a S&W 625 6 shot revolver.
Stainless (bead blasted dull)
Night sights
It started out 45acp.
The cylinders were bored deeper.
It is now 460 rowland and 45acp.
Now, the problem is that before it was bored you could fire single loose 45acp round if you had too. But now you have to use a moon clip.
My dad reloads 460 rowland.
A 460 packs more punch then a 44mag.
An example of .460 Rowland/CCU ballistics that can be expected.
Bullet Weight
Muzzle Velocety
Power Factor
165 gr.
2052 fps
338
185 gr.
1940 fps
358
200 gr.
1700 fps
340
230 gr.
1648 fps
379
The AR style in 460 rowland would be cool, but I am not sure if it would be cost effective.
To my knowledge there are not any MAJOR ammo makers for that caliber. Yes you can get CORBON and a couple other, but no FEDERAL, or other BIG ammo makers.
[img]http://www.concealco.com/4ed_med_2.jpg[/img]