I would be willing to bet the kids inheritance the 168grn FGMM was not too long. Your chamber was too short and out of SAMMI specks. This has been an issue with Savage in the past. When a shooter buys ammo off the shelf, it is supposed to meet SAMMI specks, and fit in a SAMMI speck chamber. NOT EVERYONE RELOADS. The fact that Savage fixed the chamber as described, at no charge, is testimony to this reoccurring problem. Although inconvenient, You did receive good customer service from Savage, and this is encouraging.