First one I did was a Vortex 3 that had leaked down.I re-pressurezed with my floor pump, but the gauge was not accurate ant I way over-pressurized it.Actually was bending the breech pin from cocking it.That was a year ago and it is still holding pressure (much to my dismay).......Murphy's Law strikes again........
OK! For anyone interested in converting a Vortex Mod95 to a Coil-Spring Mod95 I have started the process here...https://michaeljbernard.wordpress.com/2023/02/18/2023_02_18_hatsan_mod95_vortex_to_coil_spring_conversion/Will finish assembling the rifle later today and try to get through a 20-50 shot break-in with some velocity and accuracy testing data.Some of this post should be helpful for an NP conversion. Good luck Ron! :-)
I'd be real curios to see what you find out Ron and what you think caused the failure.
Quote from: jimbo on February 19, 2023, 09:13:10 AMI'd be real curios to see what you find out Ron and what you think caused the failure.Failure of the ram is typically a seal or O-ring failure in the ram. When a rifle is stored standing on its butt, the lube inside the ram accumulates in the rear, away from the ram end.This can cause the ram seals to deteriorate.It has been recommended that, if the ram is oriented in the traditional manner, therifle be stored muzzle down to keep the seals lubricated.Many later designs feature a rearward-facing ram. This alleviates that problem but increasespiston moving mass.Nothing is ever simple....
They are stored flat on a pallet from the manufacturer and stored for months at a time in warehouses until sold to the end consumer who, in some cases, choose to store them muzzle down.
I've also seen these dies sit in a semi closed state after a model run for a couple years to run after market service parts. Many of the die surfaces are covered in surface rust and need cleaned up and the gas rams run like new. It's truly hard to believe.The hardest thing on these gas rams are the seals being exposed to metal dust and shavings in the auto stamping industry.
Quote from: avator on February 19, 2023, 01:43:26 PMI've also seen these dies sit in a semi closed state after a model run for a couple years to run after market service parts. Many of the die surfaces are covered in surface rust and need cleaned up and the gas rams run like new. It's truly hard to believe.The hardest thing on these gas rams are the seals being exposed to metal dust and shavings in the auto stamping industry.Maybe it comes under the category of...............the season......We'll call 'em summer rams.................summer better'n others.........
Could be low grade stuff the Air Gun manufactures choose to use