Need advise for a 1k F Class rifle for daughter. She is currently shooting a 6BR rifle that is one of my sling guns, Its weight is right at 13# with 30" barrel at 300,500 and 600yds. We live close enough to a 1k range i want her to be able to shoot and not have to much wind problems. I have a .236/.243 1-7.5 twist heavy straight taper barrel to put on an action and a stock. Weight will come out to 20# or so finished. My question is , is a 243 std , 243 AI or the 6mmSLR have that much more recoil shooting 105s compaired to the BR. Barrel wear isnt to big of a concern since she may shot no more the 500 rds a year through it. The one person i knew at our local range that had a 6mmSLR passed away before we had a chance to do a range day for her to shoot it 2 weeks ago. Thanks guys for all and any input.