I had to send mine back to Savage. The go around was less than 4 weeks. I loaded up some fire forming loads with h4350 at 44.8 with a 140g bullet. Extremily hard to extract, so much could not resize cases (Norma). Savage returned stating they repaired and polished the chamber. I had also tried 140g bullet with 44.0g IMR 4831 still had extracting problems. In the end I bought some Nosler 130g and had extraction problems also, that is when I sent it back. I had the smith where I bought it fire some factory ammo and check it out, he reported no extraction problems. The head expands to .0015 over factory this seems to be ok by some or excessive by others. i will report more when I can get out.
Jim