me and my buddies iare gonna build us some 22lr for some friendly targets competition. i am going with the ruger 1022. what do i need to know? i been lookin at barrels at green mtn, they go from 125 and up. are they much differnece in the real expensive ones? does the barrel length mean a great deal on accuracy? stocks? are they any other things i might need to know? we plan on shooting at 100, 200 and 300 yards.