I tried the 20 gr slugs in mine and .. i mean I didn’t get a chance to shoot at 50+ .. just wanted to see how the gun would sound/act. For reference I settled at 130 r 2,12 hs running 18 grain pellets at about 875 fps. Slugs, to get the 900 i had the reg at 145 and HS at 2,75 @ 900 fps (fwiw...