I bought one last week and went out Saturday and ran 80 rounds of assorted ammo through it. I shot Rem. 95 gr. fmj, Rem 88 gr. HP, Corbon 90 gr. HP, Federal Hydra-Shok 90gr. and PMC 90 gr. HP. All fed good except the PMC, which would not feed at all. We also did some informal penetration testing. (we shot bullets into 2 1/2 gal water jugs at seven yards.) The Corbons expanded great (we shot 2 , one lost its jacket, both went into the second jug) The Hydra-Shok put a dimple in the back of the second jug and expanded almost as much as the Corbon. I hope to do some chronograph testing this week, i'll post the results.