Well I'm more than happy with the jsb heavy's in my .177 r10, pellet on pellet zero'd at 39 yrds , took my .177 tx200hc out aswell, and tried the air arms express in that , I didn't try shooting any groups with the tx as I stripped it down today and k knocked the power down as I found it was hitting hard and a lot of action noise, so was just bedding the spring in a bit before I chronograph it; but it seems to be shooting better; at a guess I would say about 11lb ft.