I know in the U.S.A. people use "white grease" to seal the barrel but obviously this is only a temporary measure as the grease will dissipate around the inside of the pistol. The Hyscore I was working on was absolutey hopeless even after fitting a new spring and O rings. I did the mod and at last it penetrated far more pages of a telephone book than it did previously. I did not chrono it at the time, but the next one I get in I will do the same mod and actually measure the difference.
Baz
BE AN INDEPENDENT THINKER, DON'T FOLLOW THE CROWD