Well never got to the range Friday and they were doing some long range stuff Saturday so, the range I use was unobtainium. Instead, I sorted many tins of pellets. Then I just could not leave well enough alone and pulled the brand new Superior liner off my M3 and installed the Heavy liner, I have had waiting for it a few weeks now, with a carbon fiber sleeve. The sleeve fit nice and tight in my old Gen1 barrel housing I even had to sand it a little. But it was so sloppy in the m3 that I had to glue it or it would not have done anything at all. Had some Permatex bearing sleeve retainer that seemed to be the right consistency so I used it. Hope it dries. Guess I will know tomorrow.
Cudos to FX I got the 300 bar bottle, on my gun and look is this laser etched markings on the barrel I pulled? That is definitely the right way to do it!