John,
If you want a really easy shooting practice load, try close to 40 grains of IMR 4064 under a 168. Maybe a couple of tenths less in your shorter throated rifles would be better.
Out of my 5R Milspec I've put twenty into .85" at 100 yards with thrown charges. It's gone .52 MOA at 300 yards for seven shots as well.
m
