Lefty - do you by any chance have the print/specs for the reamer that was used to chamber this rifle? I have a couple rifles that are probably chambered similarly to your setup, maybe with just a bit more freebore (0.085" fb). In the past, I have sometimes been able to get away with 185 Jugs in a chamber cut with that particular reamer, sometimes not. When it worked, the Jugs were seated pretty deep in the neck, with the boattail/bearing surface junction just at, or barely above, the neck/shoulder junction. In a recent re-barrel, my current Lot# of Jugs just aren't cutting it in that chamber, too much pressure and insufficient velocity. However, the Berger 168 Hybrids and 175 OTMs are shooting like champs. Either should work with a 12-twist barrel. I'm particularly fond of the 168 Hybrid, very high BC relative to its weight, and very good precision.