You're rifle is fine if you like shooting 40gr - 50gr & 52-53 match bullets, it should put these into tight little groups but maybe not at 600yds.
If it's windy it'll get them there but they loose speed faster than a heavier bullet, but for prairie doggin they usually work great.
A 1-12 twist will also shoot the Sierra Blitz & Hornady XS, Speer TNT 50gr, these are very destructive little bullets that won't shoot in most fast twist barrels. Look for something other than 75gr bullets, it might shoot the 62 gr but I doubt it. Think 52 and under. I bet the Hornady 40gr v-max would sing in this rifle.
