I've got a Ruger #1B .270 Winchester that seems to have lost its mind. I've had it for six or seven years and it has consistently been my 3/4 MOA or better beanfield rifle. For the last month or two I can't get a good group out of it. So far I've tried barrel cleaning, different scopes, different loads, checked forearm tension, different shooting positions, shooting on multiple days, etc. I feel like I have considered a lot of variables yet when I shoot it will put four shots into say 1.75" at 100 yards with pairs touching or very close to it. There has to be a specific problem here but I don't know what it is. For a while I really thought it was just me but shooting has been good with my Ruger Ultralight .30-06, my .30-30, my 375 H&H and my M1A, a pretty broad range of rifles, often shot at the same range session as the .270. Anyone know what my problem might be other than a rifle that is possessed by evil spirits?