I have a couple of K80s and a Kolar which has draws, wedges and a boss lock system like a perazzi.
My shooting buddies shoot perazzis. MX2000, High tech and mx8s

-All are low profile handle recoil exceptionally well. Nod to perazzi and my parcours as the best.

-K80 can handle any amount of high shell volume. Hard to imagine a better design. Metallurgy is first rate. For 3-4 hundred, you can have it rebuilt to factory spec.

-Kolar- The boss lock up, think this is a million round gun. Think Perazzi 3.0. Better design. The tolerances are aerospace level. They are in the middle of upgrading the sears to a2 steel. Coil springs, not leaf. Same with rebuild.
heavy.

-Triggers on both k guns are the best. Mechanical.

-Perazzi- Ribs have had to be rewelded on two guys guns. They fell off. Ejector has ridden over shells. First double fire I have ever seen. Scared the shit out of the owner. Leaf springs on some can break with alarming regularity. Of course you can get coil. Inertia trigger.

I recommend a Blaser F16 for game o/u. Lite, quick, basically a Woodward o/u. Lowest profile of any factory o/u. Made in Germany with mechanical, dropout triggers and a twin of the famous Merkel forearm.

They released 20 g barrels on a 12g frame this month.I am going to add a set, no fitting needed.