Sorry for not being more clear. I have an H&R .308 rifle for deer hunting. I am going to purchase a barrel for turkey hunting. I need to know which barrel to buy because they have several to offer. Am I correct in assuming that length is not as important as choke? Should I look at the barrel that has screw in choke tubes or the barrels that are choked from the factory? 12 gauge or 20 gauge? Thanks for the advice and keep it coming.