Today tried my 10mm TD 50 rounds of UMC 180 gr rated at 1150 fps, did shoot over the Oehler after clearing the picnic table full of snow, i am very satified and now worrys free, this rifle sure is a smooth operator, no FTF or FTE, quite loud and with a hefty recoil the average out of the long tube is incredible average 1490 fps for 50 shots, i have to mentionned after learning about blowback action, as it was suggested, i did apply i little dab of marine grease on the case turning it betwen my fingers to make the case lightly grease, will always do it in the future, it is a great rifle and it do have a very high fun factor, did check a few case and none had a bulge so we are good to go with commercial ammo... JP.