I bought the TSG-22 threaded barrel conversion. Took it to the range for first time today. I didn't test accuracy too much, just speed shooting at 10 yards, but it held a good group at that range. I tried 4 ammo types Winchester 36gr copper plated HP Federal Champion lead 40gr grey box Blazer 40gr HV lead Remington Thunderbolt 40gr High Speed lead Winchesters would not extract at all, everyone stayed in the chamber and did not cycle the slide back enough to pick up the next round. Federal would stove pipe about every other round. Blazer worked flawlessly. Remington Thunderbolt worked about 75% of the time, with occasionaly stovepipes. UPDATE I took it to the range again today. About 700 rounds of Blazier CCI grey/black box down the pipe today. I had about 6 or 8 failures to feed with the unfired bullet coming straight up and holding the slide slightly open. I figured out that if you don't load the rounds into the mags just right they will jam up as described. So after figuring out I have to be careful loading the mags I had no more problems. Accuracy is very impressive, 25 yard head shots almost as fast as I could pull the trigger were no problem. 7 yard group of 30 rounds was about the size of a 50 cent piece plus a couple flyers that were my fault. Over all impressions so far....................Once you get the right ammo (Blazer CCI 40gr lead round nose works great) and take an extra few seconds to load the mags with the primer end pushed back to the mag of the mag; then its a great little shooter. Wonderful for working on fundamentals like sight alignment, trigger squeeze, and trigger reset, and a TON of fun to shoot cheap.