New to the forum, appreciate the extensive knowledge base found here, hope to take away some good info. Just picked up the new Thompson Center Arms Dimension, in 22-250. Can interchange 3 additional calibers without changing the bolt... my options are .243 (nope) and 7mm-08 Rem or .308 Win. Interesting choices, similar yet some distinct differences. A little leery of the .308 availability and future, since it's also 7.62 NATO. Thoughts, ideas? Appreciate any input... thanks in advance.