Since this is a 16ga thread, I should probably note that GaugeMate sold me a set of 20ga Silver inserts for my 16ga Parker with short chambers. Told me at the time that I could shorten the GaugeMates to match the Parker chambers. Don't know if this is still the case, but nobody else was selling 16/20 inserts. The other manufacturers were pushing the 16/28 insert which doesn't do much to solve the problem of ammo scarcity in small towns.