Leather as washer material

[ccdjg]

Thanks John And what about the solid washer with a lip? Is it a cup washer or parachute seal?
The Hurricane is with the deepened piston is shooting really well with the leather cup washer.
Any ideas why most guns with cup washers have leather centres?
I never knew that about the Hubertus

I personally can't see any difference between a cup washer and a parachute washer as far as the theory goes. If you want a detailed account about piston washer theory and types see here : https://www.pyramydair.com/blog/2018...-seals-part-1/

I suspect that most cup washers have leather centres for pure manufacturing convenience and/or the abiity of the leather to store lubricant.

[Edit: I should say that the above link is Part 1 of the article, and is pretty kindergarten stuff. Part 2 is more useful: https://www.pyramydair.com/blog/2018...-seals-part-2/ ]