Lee Jurras revolutionized pistol ammo with his SuperVel line. Yes the original was "hot" but it was also within accepted pressures. It was loaded to the top and slightly undersized jacketed bullets were used -that served to keep pressures under the ceiling with charges that would qualify as "overmax" with larger dimensioned projectiles. However, since cylinder mouths,forcing cone and barrel dimensions vary widely it should be no surprise that SOME guns gave evidence of overpressure rounds.