I too, read the negative reviews about the Tauras Thunderbolt. My hankering for one got the best of me and I picked up a new one last week in .45Colt, ZCxxxx, for $485. First trip to range found the rifle to be quite accurate. took a bit to learn how to properly rack the action for the cartridge to feed, but still functioned better than I was expecting, at first anyway. By round 50, I had a cartridge that did not want to raise up quite far enough, worked through that. Around round 70, I experienced the next round in the magazine get past the holding device, under the action and locked up the entire rifle. After removing tube, and prying the cartridge up, everything freed up. disassembled action, cleaned the action, some oil on moving parts. Back to the range today, 80 rounds through the rifle with no lockup. I had 5 rounds not raise up properly into the action, a little push got it working relatively quickly. I load 10 rounds and in each instance, it was the second round not coming up. Maybe a coincidence in that.
So, it has not been without some hiccups but from what I could learn on the forum, they will get better with usage. My experience thus far seems to point in that direction. fun rifle, there is a learning curve, this I can see already. Others mileage may vary.