I have a residue forming on the top of the HW75 compression chamber. When I wipe it off, it is right back the next shot cycle. Is this something to be concerned about? Is there any lubrication needed? What is the recommended lubrication for a SSP?
There was some off-white grease on the piston of my HW45 when I bought it, new. I left it there. The more that I shoot it, the darker it gets, which would be pretty normal.
Its nothing to worry about, simply residual OEM lube getting forced out the tube onto piston. I have cleaned out the OEM yellow/brown lube and gone with Pellgun or Air tool oil…