Quote Originally Posted by dayglowfroggy View Post
I have a 25mm but found it very tight knocked over a foot and a half power off on the Chinese gun .
I have tried it in the tx and even after lots of carefull siezing just didn't find it as good as the original still less power with about the same push on the piston.
Not scientfic i know but hw seals just slip in no messing about they get my vote.
It'll be interesting to see what happens with mine then, as I've ordered the new type 25mm seal (the one that clips over the entire head and eliminates any lost volume) that fits the TX and Gamo type wedge fitting, I'm currently running a short stroke head with a HW seal on my Brocock Indy but I'm finding it hard to get decent power and I'm sure it's harsher because of the extra spring needed.

Pete