Hello all. I am I need of some good advice. I bought a Remington 700 sps varmint chambered in 243. Out of the box with any kind of factory ammo, the thing would group 4" - 5" at 100 yards. The first thing I changed was the stock. I now have a Boyds thumbhole. The next thing was the trigger. I replaced the I don't care what Remington says trigger because the xmark pro was just not adjustable with a timmney. So after those mods the groups were still not very good, a little better but not good at all. I started reloading and got the groups to right around 3". What could be wrong. I've checked and rechecked the scope base, and rings. I've even swapped scopes with my savage axis that shoots 1/4" moa all day long(but that's a different thread). I'm using a weaver t36 scope. No complaints about the scope its perfect for what I wanted.. ..Now the other day I went to the range and to my shock the groups we defiantly well under 2", still not what the axis can do but I was mystified. What could be different. Then I realized that I hadn't cleaned the gun for about 120 rounds which is highly unusual for me, I usually clean after every session. Could the gun being that dirty have been the difference? And will it get even better if I never clean it except for a bore snake. Also on some of my reloads they would group far right for some and far left for other by about 6", what could that mean? And a question I know you guys will ask is what's the twist and what weight bullet am I using. Its a 26" 1 in 9.125" and I've tried every weight bullet from 55g all the way to 105g. I still don't know what it likes but 85 and under shoot better than 85 and up.