Remember, these are what I' ve experienced. Based on shooting them in the field, not anything scientific.

Semi-auto:

Best: Benelli Super Black Eagle 12 gauge. Shouldered perfectly and shoots to point of aim. Does not need to be " spotless" in order to function.

Worst: Winchester 1300 (I think) Semi-auto 12 gauge. The thing needed adjustable sights in order to hit anything with it.


Pump:

Best: Mossberg 500. Shot everything I put thru it, hit where it was aimed.

Worst: Winchester pump 12 gauge. Always failed to feed that last round.


Double Barrel:

Best: Franchi Veloce 20 gauge over/under. Beautifully made, light, accurate.

Worst: Don' t know, never could afford one before the Franchi.


Bolt Action:

Best: Beats the heck outta me what make it was. I got it when I was 10. It was a .410 and killed everything I pointed it at from rabbits, to squirrels, to quail.

Worst: Never had one other than the above mentioned one.