I have shot Browning Golds plenty. The guns were designed to run anything and the RED piston was brought out for light target loads. Before I would mess with the piston, if the gun malfunctioned, I would change the springs first. Action Spring in the buttstock and mag spring. Mine have eaten plenty of every load imaginable (waterfowl hunt a fair amount and the Gold is my main conservation snow goose gun). Springs will need to be replaced before the piston in my approximation.
Use the guns and don't over think it. If you have problems call Browning or Midwest Gun Works. Midwest is just down the street from Browning's service facility in Missouri. Both know their stuff on these guns and should be willing to help you out.
Thanks! Interesting observations, much appreciated.
