![Quote](images/misc/quote_icon.png)
Originally Posted by
Benelli B76
Polyurethane elastomer seals are by far the best. Having "memory" resilience they can take a pounding and keep their shape. I make my own on a lathe and seen old rifles improve after fitting replacements. Having a thin lip parachute design gives the best results. Most manufacturers today use polyurethane.
Baz