Pardini SP22 Rubber Donuts replacement cycle

I'm sure it was already discussed as I seam to remember seeing posts.  However I can't find it, and would appreciate someone replying with links! 

Issue at hand:  are there signs that indicate it is time to replace all those little black o-rings, that help dampening recoil on SP22, or it should be done as a maintenance procedure after so many rounds through?

Thanks,
AP

Based on my experience as an enginerror, I’d measure the stack at every year or 5000 rounds (whichever comes first. If the stack is less than 2/3 of what a new stack, or if there are any cracked or broken, change them all.

Wobbley wrote:Based on my experience as an enginerror, I’d measure the stack at every year or 5000 rounds (whichever comes first.  If the stack is less than 2/3 of what a new stack, or if there are any cracked or broken, change them all.

I myself is an Enginerror and I say if you shoot a full season it makes sense to spend the couple of bucks to replace them annually! Not anally! Lol

Especially if your lower is also used for a HP conversion