Here is a pic for a comparison.



243, 6mmCM, 6mmSLR

Again the SLR is formed by compressing a 243win case down to 30 degrees and about .1 longer neck. The 6CM is a blown out case. It's formed basically the same way as a 243AI would be. (Fireformed). The cool thing about forming the SLR is that you can actually get .0015 head spacing with virgin brass by specing it off your chamber, so no fireforming. I resize my brass by doing a .0015 shoulder bump so it's consistent every single time. It loads and extracts like silk.

I'm a poor lazy bastard and would rather blow powder and bullets on what it's intended to be used for and not have to worry about wasting barrel life, and brass life.

But then i've got a buddy that's shooting a 115g out of his 243 at 3100fps, with no pressure signs, just a powder that he's cooked up. Unreal.

xdeano