BSA Mercury - Worst strip ever! + what replacement piston seal?

[Binners]

Blimey! The rubber has totally failed!
Yes, think it was the nylon head that had swollen to be a tight fit. After doing a bit more searching, I have found that replacing the entire head with ally at a slightly shorter length, the slight increase in stroke is not an issue to help air cushion the piston at end of travel.

Hi Geoff,
I knew you would enjoy her (I think?) :-)
Rich

Some fat bloke owned this rifle for about 5 days and instead of servicing it, he past it on at cost.

Clever them fat blokes

[mrgeoff]

its all good fun, and a nice learning experience, will be a lovely thing for sure when finished :-)

I want to drop the nylon head for sure, still un-decided on what piston seal I will run.