Re: THOMPSON ENCORE 308 SUB MOA rifle ?
With a proper trigger job you should get sub moa.
After a trigger job mine in a heavy 26" barrel will go into 1.25 inches at 200 yards all day long if I do my part. That's in 25-06 and only 200 yards.
There's good info on mike's sight that will give you ideas on things to try.
One thing to look for is a good scope mount, my wife has talley bases on hers and it looks to have much less gap under the front of the scope mount than most of mine.
My Encore has the black plastic stock on it. This seems to be the cheapest made of all of them. The fore end is very sensitive to the torque applied to the front screws.
It will open up the group size double just by over tightening them. I bought a torque wrench in inch pounds just for this. My wife's has a different stock and hers doesn't seem to be affected as much.