Slide extension o ring

[darron]

How many rounds are you guys getting out of your slide extension o ring buffers in sp 10? I purchased mine used and it had one in it. No idea how long it was in they. I have put about 50-75 rounds through my 10 waterfowl hunting. I cleaned it this morning and noticed the orange o ring was in bad shape so I replaced it. Curious how many rounds I can expect to get out of one?