Originally Posted by
NickG
I have been using No 11, in my 21 & 22mm tunes , I have had 2 break, but have had others still running after many thousands of shots so could be a manufacturing problem, ie springs from different batches , having said that I have also had a aa mk2 spring fail in the past. My kit uses full ally o ring piston with rear bearing.
On another note I have just returned to a previous project 23mm, and applied a different approach, this has a steel full piston and utilises the standard mk 3 spring , it shoots well at short distances I now need to get it into a target stock to see if its any good at 55 yds .
Yeah, I like my 23mm - much more cost effective conversion as the existing piston and rod can be used, with just a turned down HW seal on a new nose (same rod as a mk3, saving more costs - when you add the nose (+5mm) and HW seal (+6mm), you shave 11mm off the 98mm stroke, so 87mm - great at 23mm bore. Mine's been running for 2 years now without issues - but then I don't shoot that much
I also like the fact that your 22mm is full boddied / has a piston bearing.
I too use the titan #11
Always looking for any cheap, interesting, knackered "project" guns. Thanks, JB.