I had not planned on buying a new gun until spring but I sold my MK3 compact quicker than I thought so I pullled the trigger on the Wildcat MK3 bottle with the 700mm barrel and the heavy slug liner. I am using the gun solely for hunting and I wanted to shoot slugs. We are right in the middle of hunting season here and I didn’t want to spend a lot of time tuning so the I had the guys at Utah air guns tune it for the 33 grain Zans. I also bought some 29.5 NSA’ and some FX hybrids just to see if certain ones would group better than others. I shot a couple of strings through the chronograph… the Zans shot at an average 978 fps the NSA’s average at 1007 fps and the hybrid slugs at average of 1041 fps. It shot the Zans and the NSA’s grouped okay but man it loved the Hybrids. At 50 yards it shoots hole in hole and at 75 it’s pretty close to that. I head shot a squirrel at 75 yards this morning. I’ve never had a gun that would do that. Check out the expansion on this hybrid slug I dug out of a squirrel I shot at 75 yards. I’m thinking I will just leave it alone for now but do you think I could the other slugs to shoot just as good. My second reg is set to 130 bar. I can get close to 60 shots before it falls of the regulator. For those of you with more tuning experience that me would you just leave it alone?