I know it is crazy to start tinkering with a good shooting gun, but that was why I bought it. I wanted a gun I could use to learn how to change barrels using a barrel but system and liked this one over the savage. I have changed the barrels several times and have seen very good accuracy with both the original 243 tube and a savage 308 barrel I used for reduced loads (30-30 bullets out of the 308 at 2100fps). With the savage 308 barrel I did not have to do any trimming, but based off my measurements using a go gauge it was close. I have a PTG 223 bolt head for the rem 783 on the way to see if it will work as talked about over on the marlin owners forum. I really want to run a 6x45mm in a marlin and am going to play with this receiver before I buy a new one.