we just never did ,in all these years I can count on less than ONE hand how many aftermarket hammer,triiger springs we ever bought, always used the factory ones, and smoothed ,deburred the guns and its actions ( innards) what each part rides on, or moves with/against.......I do recall on 1911s maybe snipping a coil here or there, but still used factory springs and adjusted them accordingly ( or the main slide redoil spring, bounce back and forth between #14 and #16 pounds depending on the loads, wadcutters versus ball) Wolf and others sell a LOT of them to the homedoers, backyard gun plumbers..........oh well what do I know after 76 years, 60 of them tinkering on handguns.....worked at/with S&W, High Standard, and Dan Wesson.
someday I will have to put a pile of them still in the packages we have come across in gun buys, & sells, on the table at a show but I again NEVER< seldom?? get a request for any aftermarket 'spring kits'................practice and built up hand strength and trigger finger pull..............doesn't mess up having 'Misfires ' or mess with lock time on a single action either.......... one thing to have "issues" with a "target" gun, versus a carry, duty or home defense gun.............