I started load tinkering today with my stock Savage Blue/Black using 325gr FTX and 250gr Monoflex and SR4759 and 5744 powder. Before I started I drilled out the flash hole with a 5/32 drill bit and replaced the vent liner with a Lehigh. I was amazed that my first group using the 4759, CCI 209, BCR, and 250gr Monoflex fell into a .9" group. I then shot a couple of shots with RL7, but didn't care for the recoil and dropped back to more "standard" loads. The next group using the same 4759 load except for orange MMPs opened up to around 2", then about 2-3" with different combinations of 5744 and 4759 and Monoflex and FTXs, including duplicating the initial load entirely. I allowed the barrel to cool for at least 5-10 minutes between shots and redrilled the breech plug at one point. Why couldn't I duplicate the initial group? How often do you guys redrill your breech plug and/or clean your barrels when shooting for groups? I cleaned it once I got home and it was quite dirty, so I assume that this could be the culprit. Any more suggestions?