I have looked up er shaw barrels, from what i have read they are good but are on backorder for a while. I am thinking a 22" with a 1 in 10 twist.

I have a kinda retarded question. I know that a sporter barrel is stock/slim barrel, but what is the difference between a bull barrel and a varmint barrel, is the varming a little bigger/heavier and more accurate than the bull?