I had the option to try my L40-A1 today with an IGB Austria 357SIG conversion barrel. I used factory S&B .357SIG TFMJ 140grs nontox ammunition and it was an eye catcher. The staff at the Steyr Mannlicher shooting range here next to Wr. Neustadt came inside when they heard the unusual...
For anyone looking for a M357-A1, here's one for sale in Alabama. Fantastic price especially with night sights, 3 mags, gold dots and a holster.