Looking for some help here. Wanting to pick up a varmint rifle for squirrels, rockchucks, and coyotes. Most of my shooting is 300 yds and in, but I like to play with some longer shots out to 600 yds. Have had a .223 in the past and loved it due to the low muzzle blast and lack of barrel jump, but couldn't really do much with it past 300 yds. I know a .223 will do what I want if I match the right bullets and loads to the right barrel twist, so thought I'd pick your collective brains on this. Pros and cons for 7", 8", 9", and 12" twist rate for what I want to do? I can get a Savage Model 12 (26" fluted stainless varminter with laminated stock ) in both 7" and 9", or a Sako Model 85 (24" fluted stainless varminter with laminated stock) in an 8" twist. I'm thinking the tighter twist rates will help me at distance due to their ability to handle the heavier/longer bullets, but what can I expect to sacrifice on the lighter bullets? If I go with the tightest twist (7") do I effectively preclude my ability to use bullets in the 50 gr range? Will look at other calibers if I need to, but don't want to fight muzzle blast and barrel jump. Thoughts? Thanks in advance.