Quote Originally Posted by Hsing-ee View Post
Is yours a full-power USA spec rifle? They are designed to work at that level so only need little adjustments; to get them perfect at 11.4 fpe the amount of messing about some Brits do is amazing. Like Jon Budd's 22mm piston sleeved down rifle...
All are short stroke 12 ft. lb. models. I do have 2 MarkIII's, but they also have MarkI pistons. I think 1 or 2 have the old FAC MarkII pistons (93 mm stroke) as well. These were stroked in between the old and the current stuff. You can use a softer spring and get easy cocking as well as 12 ft. lbs. I have 8 TX's and it's hard keeping up with the innards details. For sure, all have Maccari Apex seals.