I don't see why the hammer hitting the nipples is such a big deal as long as there isn't a problem with function.
Any indentations left on the hammer face won't be as deep as having filed it down.
And once anything is filed the surfaces may not mate or hit every cap as flat as they did originally.
It might be better to take a conservative approach and wait to see if the surfaces minutely wear in together or not and then only address any problems if they arise.
Rifle nipples get hit hard each and every time the gun fires and neither the nipples nor the hammer notably suffer.
Last edited by arcticap; April 14, 2010 at 04:47 AM.