One of my favorite Varmint hunting rifles is built on a XR-100 action.........I had problems to solve though. the bolt face had a .250" hole for the firing pin so I had to send it off to GreTan to get the bolt bushed. had problems getting a Jewell trigger to fit properly.....etc. once all problems were solved this rifle shot 6" group at 1000yds as a 6mmBR AI