Failure to go into battery every time

[Doubs]

Originally Posted by DonVoigt

Sprangy,
That is not the original or intended purpose of the grooves, they are there to collect gunk, dirt, trash and allow the striker to still function.
It is however often repeated "common knowledge" that is just not accurate.

This subject has been the focus of several threads, but if one simply observes the location and extent of the grooves, it is clear that there is nowhere for any trapped gas to go, even with the striker to its full rear position.

Don, while Gortz & Sturgess acknowledge that the flutes had the primary purpose of allowing oil and dirt to flow past the firing pin to prevent build up of residue that reduced the impact force of the firing pin, they also point out that the flutes do, in fact, allow gasses from a punctured primer to bleed off and reduce the rearward thrust of the firing pin that would otherwise cause damage if the firing pin was not fluted. G&S point out that it is a benefit but, as you state, not the purpose for which the flutes were intended. G&S red books, pages 1115 & 1116.