Quote Originally Posted by T 20 View Post
I did measure this wrongly.

After stripping the action this morning I found the stroke to be 69.45mm, this ties in with my prediction of the stroke in the above link, which I missed yesterday.

I will try to have a measuring session over the weekend and then work out the design for a new piston, though it could be that I could extend the stroke on the piston I have.




All the best Mick
The stroke is somewhat limited by the cylinder in itself. I think you may be able to reach 75mm, but not much more.
And you may probably reach those 75mm's by just trimming the front of the piston.
I'm a bit afraid to take too much off and have the piston coming apart during cocking.