Originally Posted by
The Squire
A guy called Martin posted this on the FB rammer group, I’ve not verified it but have no reason to believe it’s wrong:
I serviced my Evolution HE last month.
Kit I bought seemed to have 90 shore orings in and didn't seal.
Measured them and ordered some 70 shore ones and it sealed straight away.
Sizes you need are 18 X 2.5 four required and 13.95 X 2.62 two required.
The later is an imperial equivalent.
Loads on .
Small amount of engine oil to lube on assembly.
I'm 500 shots in and all good.
Pressure set at about 50 bar then chronograph and tweak.
Older guns run at lower pressures this pressure is only for HE guns