ORIGINAL: RugerM77.270

Are you using the same ammo you used last year?

Take the scope off and remount it using locktight on all the screws.

Check the action screws and make sure they are tightened and in the correct order. Put the action in the stock and put in the first screw by the magazine, don't tighten it down yet just get it in there. Then do the same for the one on the trigger guard and finally the one in the middle. Don't tighted one down all the way and move to the next one, do each a little at the time until they are all at the correct tightness. The top one (angled one) should be really tight, the middle snug enough to not fall out and the rear on really snug but not cranked all the way down. I used to tighten mine ruger all the way down and the action would bind and send groups all over the place.