Obtunded: I agree with your estimate of barrel life for a 204. My Hart varmint contour 1-12, at a documented 458 rounds fired, is already showing some serious cracking at the front of the chamber mouth, and the very faint beginning of "alligator skin" firecracking in the leade area. With a borescope, you have visual proof of "what's happening", not some wild unsubstantiated claim of "5 to 8000 rounds of barrel life". For me, it will mean a short life-span for the 204: that could be good news, if I can't get the thing to shoot.