Does anyone know how long a factory piston seal wil last? I'm just about ready to get the Maccari kit for my well taken care of model 34, and I'm wondering if it's time for a new seal too. She's had about 2000-2500 rounds through her.

If you haven't placed your order yet I would get a seal also.Just my two cents worth.Good Luck and Good Shooting,Gary

A lot of factory piston seals get damaged when the gun is assembled at the factory due to sharp edges on cut-outs in the action. That's part of a "tune", getting rid of those burs so the seal can be installed without damage.

 Anonymous,

 Except for teardowns like you are doing, errant dry-fires that may damage them, and abuse thru mistreatment, generally a well cared for gun's piston seal life can be measured in decades not shots! I own a number of 30+ year old guns which still have the origonal leather seals in them, and I don't intend on replacing them at all. In fact I have two that needed fresh mainsprings but did not need seal replacements yet...

Most leather seals can be revived with just a few drops of good silicone oil. many synthetic seals in todays guns don't even require lubing (but the rest of the gun does). The key is to keep your airguns lubed according to factory (and common sense levels, with quality lubricants.

 As was suggested, I would carefully de-burr your rifle before reassembly to prevent damaging the new seal.

 HTH,

 ZVP