26"...H4350 but don't get all hung up on powder as I've said above there's a lot of powders that will work just as well...LoneWolf is shooting IMR4451 in his 6mm CM same brass bullets and primers as I am and is doing very well in his matches.

Just an FYI...I shot a 260 for about 7yrs and just switched to the 6CM...I've shot 1240 rounds in about 4-5 months and I'm impressed enough with the 6mm that I've sold off all of my 260 stuff and wish Ida made the change a long time ago.


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