Quote Originally Posted by Benelli B76 View Post
Would be interesting to see what stands up best to the continuous impact, Delrin at 84 Shore D hardness or Nylon 66 at 80 Shore D. Sometimes you get surprises depending on the application. I have had to replace the nylon valves that crack in pcp rifles with delrin and they seem to last so far.

Baz
Well i've got dimples in the ends of Walther and steyr steel hammers from bashing the end of valve stem .