Back at cha, Sir Charles. I spent the day sighting in a new Hawken rifle, and tested some loads in my '76 Winchester.
Incidentally, I tried 13 gr. Herco with a 300 gr. BACo bullet, lubed with SPG. I added a 1/2" plug of closed cell foam to keep the powder on the primer, and got good ignition and decent accuracy at 59 yds.