I just got done putting my Stampede through it's paces. All in all I'm quite satisfied. "Now" my barrel Measures .4515 and my cylinder throats go .4545. I say now because I firelapped the barrel using LBT bore lapping method. I had a barrel constriction at the threads that measured .450. Could be your problem. I also had some roughness by the lettering, quite common in all the guns I have lapped, including the ones we've come to compare all to, Rugers. I might add I have done bore lapping to all my revolvers, some even before I shoot them, as after you do your measuring, you already know your going to have a problem. I say this because I don't have any before and after groups, just after. I sized my bullets .454 ( L.B.T. 255 LFN pb, W.W. & a bit of tin, air cooled, at about 14bhn) Lubed with lbt Blue soft. I've fired 10 shot groups so far, working up an accurate "colt" load. WW231, Titegroup, HS-6, and good 'ol 2400 (hercules I might add). I do 10 so as I get a better average on velocities, extreme spreads, etc. The clear cut winner has been 2400 with a standard load of 16.5 gr. HS-6 is becoming a favorite powder for me in the 45 colt, coming in second with in accuracy. The 10 shot group fired with 2400 measured 2.5" at 25yds. extreme spreads are up there with 2400, which in my experience is common. Titegroup, while not as accurate gave the most consistant performance. I will add I fired 96 firelapped shots (16 cylinders full w/ alot of scrubbing in between). To me it's not a quality control thing that makes you have to do it. Like I said, If you have a problem with a Ruger, it just seems to be that ONE gun, anything else It's "ALL" the guns. Nothing could be further from the truth. My stampede came from the factory with a fantastic trigger, My Bisley Vaquero needed a $90 tune up. My Stampede shoots 4" left, common even to Colts, perfect elevation for me 2" high. An easy fix. My Bisley vaquero was 8" left 6" high. A new, higher sight dovetailed into the barrel was the fix there, $175. It was also interesting that Ruger sent the Test fired and I assume sight in cartridge, with the gun a, "44 special". That one is chambered in .44 mag. Must be within their specs! I'm waiting on a Mold from LBT, a 255gr pb Kieth, I now have a good start to my load devolopment with this new bullet. 2400 and a Kieth semi wadcutter, Good shootn' CRASH87