What size is the proper size, (and company) for cleaning the barrel of the H&R, 45-70, BC, 32" barrel? I have tried all different types. 2" 2-1/2" 3", square, round and hex. Most say for 45 cal. got one that said for .458 cal., way to thick. It's to small; thick or even one saying double tweed or something like that. Thanks beng