I have one G2 carbine and one original carbine. Barrels in .221 FB, .204 Ruger (2 of those), 6mm 30-30 AI, a few more and a couple on the way. Some are custom barrels from VVCG, Bullberry, MGM and some are factory. Your guess on the weight is right on for 21-23" bull barrel....maybe just a bit more. I won't tell how accurate they are because it means nothing until you see it....lets just say I use them to shoot prairie dogs regularly and several shots go over 400 yds. My personal best is with the .221...at a ranged 551 yds. took four shots to figure the drop.
I have at times owned TC Contenders from the first generation in the seventies on..........I'm a believer but there are some technique differences in both loading and shooting.