Hey Russ ! I am doing the .20 cal Win 1000X, ya I got bored today and took apart the 1000X and removed the barrel just to see how it was assembled.
The barrel is screwed in like the Gamo's, in fact it's the same thread size, and other than the lenght of the threaded part you can screw in a gamo barrel. Barrel came out EASY,I just removed the barrel pivot screw and I stuck on my brass vise jaws and clamped in the barrel and took a rag over the pivot block and a cresent wrench and unscrewed it off . Hardly no pressure to unscrew the barrel it kinda suprised me. The pivot screw is what holds the barrel in the block, they must drill the hole after the barrel is installed because if the pivot hole.
This 1000x was putting out 7.9 CPL's at 1050 or so, and if it will push 11.2 gr FTS's at 800 or so it's going to be a killer rifle. Will keep ya informed.