Just picked up a lightly used rifle marked... SAKO AV 579667 (marked along the receiver opposite bolt side) SAKO Cal. .375 Mag (marked on barrel only) Am I correct in assuming this caliber is actually a .375 H&H Magnum? Any way to verify with factory records? Don’t see AV as an option for the “Factory Records Service”. Is the AV series too new? Seems to be a very functional weapon, nice trigger pull, quality bolt operation, solid feel.