6mm Competition Match by MCR

[Dgd6mm]

can u convert a 243 chamber to CM without cutting it back?

I am not sure about that. If not you could always take .250" of and it would definitely clean up and pick up the threads.

 

[CONatureBoy]

yes this all sounds accurate to me,but most of the information on the internet and forums claim just the opposite.i've always been a .243 win fan myself,but have been reading that the .243 has a shorter barrel life than most others.i myself have not found this to be true.especially since i've started shooting heavier bullets and slower powders from mine.

The 243 Winchester has a short neck. My understanding is that has something to do with it.