I guess it really depends on what gun you are shooting semi-auto or non semi-auto, max ranges, whether it's in a trap i.e handgun ranges, or calling. You hit bone even 22 LR's can cause damage. If legal in your area and you are calling and not using a semi auto might want to look at and test in a block of clay or other test media if you can to find a good load that doesn't really tear things up. Might look at FMJ 223 bullets and load down to under 2000 fps maybe under 150 yds or so. Other school of thought is super velocities with a frangible bullet that completely comes apart Might look at sintered bullets, One of the better set ups and several hunting buddies use over under Savage shotgun / rifle barrels and select your barrel depending upon range, put a scope on it you can sight down the barrel for up close shots using the shot gun barrel use bird shot and load lite, use an open choke. Baikal made some over under shotgun / rifle guns. on the rifle barrel side I guess choose your poison. Years ago when it was Legal here in certain seasons turkey gun was a 30-06 using very hard cast lead bullets and load down carefully with the correct powder to 1800 fps of less with a 180 grain round or flat nose bullet which does not expand and pokes holes right thru unless you hit bone and then you get secondary wound channels from bone splinters. Might even use 22 LR or magnum with heavy lead bullets if it's Legal in your area for fox and bobcats. I suggest making up some clay, gelatin or wet news paper go shoot some loads and then make a decision. Pelt prices are down from a few years ago, I don't know what prices currently are.