Also have the 500 in 26" heavy from MGM. Shoots 2" all day at 100 with Hornady FTX 300 gr. at 2300 fps, 45.0 gr Lil Gun. Hornady 350 gr. XTP's also shot good but not quite as well as the FTX's. Still impressed with the recoil, about same as my Hammerhead slug loads. Looking forward to IN deer season to try it out. Last year, I arrowed an exceptional buck so I couldn't give it a try. I am hoping MI passes HB 5416 which will allow it for this years deer season, will be close if it is passed.
BTW - I went with the 26" heavy for barrel weight forward and am glad I did, handling and balance is very nice for those off hand shots.
Muddy