Originally Posted by
stimpee
How many rounds thru the gun?
We have found that with the lighter hammer springs, the gun can be much more sensitive to "schmutz" buildup in the firing pin channel and may require more substantial cleaning than normal. This is shown via evidence from doing firing pin indent tests on SAAMI spec copper crushers before/after a thorough detail strip and cleaning.
However should be probably 3500-5000 rounds before you would ever see this, depending on the ammo you are using. Some ammo, even decent quality stuff, can burn kind of dirty and gum things up.