I got the want to build a 6mm so I read everything I could about the 6cm and decided to build one based on the fact the case is shorter and bullets can be loaded farther out and still fit in a short action.
I bought an old Remington 700 22-250 varmint model. Ordered a Rock 6mm 7.5 twist bbl and a McMillan stock. Put a break on and now have a gun that is so accurate to is almost boring to shoot.
I shoot 105gr Matrix. And use a NF 5.5-22.