I'd suggest starting with a good cleaning and inspection before retempering springs.

An accumulation of old dried lube and grunge can cause the issue you have, and so could something like a firing pin that is mushroomed on the rear end. Also take note whether the problem is specific to only a certain brand of ammo. And check for equal firing pin protrusion by removing the barrels and dry firing while holding a small block of soft pine against the breech face.

Voting for anti-gun Democrats is dumber than giving treats to a dog that shits on a Persian Rug