Can you spot the problems?
Shooting would be easier if you finished putting the rifle back together. first...
I think comparing hunting riles with match rifles is like comparing race cars with pickup trucks. Other than having certain major things in common (like 4 wheels, for example) they are made quite differently, for very different uses.
Lever guns with barrel band, guns with tube magazines, semi autos, and about everything with a barrel bedded in the stock will shift POI as they get hot. ANYTHING touching the barrel that doesn't heat and expand exactly the way the barrel does will have an effect on barrel harmonics as the barrel heats and expands. Guns made for match shooting, strings of fire, and not just a shot or three at game animals are made with features that minimize or eliminate the issue.
I expect hunting rifles to be just that, and accept the fact that they may only shoot well enough to do their job.
A 2MOA rifle will put venison in the freezer (provided you do your job right) but isn't the best choice for woodchucks or other small varmints. Doesn't win "smallest group from a bench" challenges, but does the job it was built to do, just fine.
I shoot "one hole groups" every time I shoot my single shot rifles or pistols.
What does group size tell you, anyway? How far off point of aim any shot can be expected to be, with no other factors taken into consideration.
Nice to know, but not everything one needs to know, or take into consideration, I think.