What is the difference between L.U.P VS PSI? P.S.I. (pounds per square inch) and L.U.P. (lead units of pressure) are used to measure chamber pressure in the various shotshell gauges. L.U.P. is calculated through the use of a lead crusher and was used for many years, but has been replaced by the more accurate P.S.I. […]
shot gun
Shotgun Bore Polishing
Shotgun Bore Burnishing: Actual gains in pattern density, evenness and point of impact consistency can be had cheaply by simply burnishing the shotguns bore, chamber and forcing cone. This applies to all shotgun bores other than chromed bores, all shotgun bores are polished but not burnished, burnishing removes all the scratches from shotgun bores left […]