I own a Savage Model 110 7mm Mag. My Father and brother each own identical guns to mine. My brother years ago had some empties from his reloaded. Unfortuneately, after one reload the shells either cracked or just plain broke off just above the belt during the second shot. I have purchased a reloader and am just getting started. (Having some fun with my 220 Swift!) I have compared my brothers 7mm empties with mine, before I spent the money on the dies because it was determined he has a headspacing problem with his rifle and I figured if they are similar to mine that I too may have a headspacing problem. Using a caliper, it seems that mine may be worse than his by a couple thousanths, as far as stretching goes. And we both have a similar "bulge" just above the belt on the shells where I think his were cracking. I am very "handy" with tools, but I will not fool myself into believing that I am an actual "gunsmith". So does anyone know if the headspacing on a Savage 110 can be changed by loosening the barrel nut and carefully tightening the barrel into the receiver? Or is this strictly a "professional" project? If so, about how much does it cost to have the headspacing corrected?