6mm-223

[belizejet]

OK, another question. I am thinking of finally pulling the trigger on a 6x45 barrel in 18" but dont know what twist. 1:9 or 1:10? I plan on trying standard size .243 projectiles like 85grn plus or minus. not any heaver than 95grn or I would lose any advantage you gain over the 300BLK. I bought the dies already to start making brass and now I want to build the upper.

[SideShow Bob]

OK, here is a dumb ass I don't know crap question.

If the 6 and 5.56 (.223) both are 45mm in length and using the same bolt, what prevents one from pulling a Tard move like chambering a .223 or 5.56 and pulling the trigger in a 6X45 ?
I can see the oppisite of a 6x45 not fully chambering in a 5.56x45.

[merl]

OK, here is a dumb ass I don't know crap question.

If the 6 and 5.56 (.223) both are 45mm in length and using the same bolt, what prevents one from pulling a Tard move like chambering a .223 or 5.56 and pulling the trigger in a 6X45 ?
I can see the oppisite of a 6x45 not fully chambering in a 5.56x45.

Nothing. Firing 5.56 in 6mm wouldn't hurt anything. I would not depend on the larger bore preventing chambering of 6mm in 5.56. It has happened with 300blk in 5.56 chambers...

[Colorado Osprey]

OK, another question. I am thinking of finally pulling the trigger on a 6x45 barrel in 18" but dont know what twist. 1:9 or 1:10? I plan on trying standard size .243 projectiles like 85grn plus or minus. not any heaver than 95grn or I would lose any advantage you gain over the 300BLK. I bought the dies already to start making brass and now I want to build the upper.

Most of the bullets larger than 85 grains will shoot, but will not feed from a standard AR magazine. I have a C-products stainless mag that lets me get a few more thousands of overall length to shoot 87's.
I shoot mostly 85's in a 1:10 20" barrel AR. BTW the 60 grain HP's are outstanding in both velocity and accuracy. They seem to hit coyotes way harder than a 62 grain bullet from a 223.