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While my 34 shoot more consistent chrono numbers with the old oem piston seal the shot cycle is much better with the vortek seal in the rifle. I should have taken a picture when I had the gun apart, but my piston showed a lot of rubbing on the bottom side of the metal. This is why I think my...

Very loose in the compression chamber compared to the original. I was debating getting JM's "Old School Buttons" from ARH think it would help center the piston for a better seal. I am not sure if there are other piston seals that may work better because every forum seems to say Vortek seal is...

I allowed 200 shots before testing and I stated that I only used rubbing alcohol to install the piston seal onto the piston as it was giving me trouble. I followed Pellets & Piston YT video for the install process and degreased and lubed accordingly. It was clear the Vortek seal was not a good...

I recently put this kit in to my 20 year old Diana 34 date stamped 10 00 T01 trigger. I purchased the Diana 34 PG4-STEEL Tune-Kit HO with moly seal and new breech seal. With a spring vise rig it was really easy to work on the rifle. The Vortek piston seal was difficult to install on the piston...