RE: strange bullet patterns on target
Maine,
If you are getting 1" groups for 3 shot groups without letting the barrel cool between shots, with two different bullet weights you have a great shooting rifle. Leave it alone.
As another posted if you are just curious about the consistency of the groups try letting it completely cool between shots and see if it still groups the same. But regardless my advice is to leave the rifle alone, if you start fussing around with it your groups may head the other direction.
Free floated barrels are the way to go if you can get good groups, they will give you consistent accuracy.
Pressure points will sometimes give you a better group under certain conditions but when the conditions change so can your groups move around on you.