I too like the 6mm's. Dad shoots a 788 in 6mm, My brother and I both have savages in .243 and then came along my jewel. Remington 721 action with a 28" montana rifle barrel, boyds jrs stock and timney trigger chambered in 6mm-06. I bought it second hand, so I don't know all the chamber specs, but it came with redding dies and it will shoot. I use a mixture of 6mm, 6-284, 25-06 and .240 weatherby data for a starting point and reference. I've never had a gun shoot so accurate with different loads without changing poi. IMR4831 is become my powder of choice in it. Altough h414 isn't bad with the 65 gr vmax and 68 gr bergers.