The S/W model 39 gen II and first gen 59, are IMHO, underrated. I have no idea why these are not sought after guns. A friend and I invested in a progressive reloader press with dies for 9 Mil. So we would go out and run one to two hundred rounds per session. He had a Glock 17 Gen 2. Which at the time every one considered the penultimate hand gun.
Even switching guns, between us, the 39 and the 59, were more reliable than the Glock, which, on occasion, 300 rounds or so, would stove pipe. The 39 and 59 never had a stove,... ever. Maybe he got, by chance, all the bad reloads?