Quote Originally Posted by evert View Post
I sold mine, which was a .177 with the metal pop up loading tap.
Did a lot of experimenting with seals, piston weights and springs, but the gun was a slammy mess when pushed above 8fpe.
Accuracy was ok but never really good.

In the end I fit a somewhat reduced spring that gave it a more pleasant shotcycle, a fresh seal and fitted guides, and sold if off cheaply with clear info that it had been soft-tuned.
Quote Originally Posted by coburn View Post
Pretty much my experience with my .177 57. Bought it from Germany back in 2019, it was running at 6ftlbs due to the German market mainspring. Re sprung it with a cut down 97 spring, big mistake, 13ftlbs and awful to shoot, after a chop and coil collapse, now running at 9ftlb. Still not as accurate as i'd like. I think the longish stroke and light weight go against it.
So, guessing that these may be similar internally to a 99? So 26mm bore. Anyone know the stroke and TP diameter and length?

I'm guessing that the pellet will not be a snug fit into the loading "gate", reducing the SCR massively as the pellet has to jump from gate and it will be a looser fit than a pellet which has snugly clicked into the rifling. After this very easy first stage of its journey it then has to engage breech and rifling, without that helpful thumb / finger of humankind assistance? So, guessing that this will magnify the slammy effect, but might it also then see a spike in pressure as the pellet engages breech, promoting extra piston bounce?

Having said all that, although not desperate to own one, I could actually see myself rehoming one one day.