Winchester 21's do not need low pressure shotshells.....my lifelong shooting buddy competes in the pigeon ring with 21's and fires thousands of 3 3/4x1 1/4 pigeon loads through his guns without any problems. It takes a helluva lot of shooting to wear the locking bolt and or hinge pin to the point of replacement. Open and close the gun like you would any fine double and you might replace these two parts once in your lifetime. Shoot any load your 21 is chambered for. This is not a gun you have to baby due to its age.
