The gun was designed for a 16.5 lb spring with a slightly radiused firing pin stop while shooting 230 grain hardball. Shock buffs were a solution to the extra battering after the beveled fps. Heavier springs are not necessary and can cause more problems than they cure.
Well said!
If you want to anger a conservative, 'Lie to him'; if you want to anger a liberal, 'Tell him the truth'!