TeeBone, I mean in reference to the Husqvarna. They made 9,3x57's, not 9x57's.
People freak out about shooting a bullet a couple thou over bore diameter. It's not the bullet size but the ability of the neck to let the bullet loose upon firing. I once bought a rifle sold as a 9,3x57. It came with two boxes of Norma ammo; one full, the other partial. The half box had been fired through the rifle. When I received the rifle, I did a customary cleaing and noticed my 9,3 jag was too tight for the bore. I slugged it to fund it measured .356" not 366". It was in reality a 9x57 but the chamber neck was large enough to chamber a 9,3x57 and had sufficient clearance to release the bullet. I fired the remainder of the box before rechambering to .35 Whelen. The .366" bullets swaged down upon their trip through the bore and produced a nice 1.5" group at 100 yds. It is an open sight only rifle.
