They were reasonably accurate, though not as precise as the Korean-era US 57mm recoilless, due in part to the heavier round requiring more careful range estimation due to its drop in flight. The Swedes sometimes fielded a neat little optical rangefinder good out to 800 meters or so with it, nowadays you can get a golfer's/bowhunter's electronic laser unit accurate to a meter for a hundred bucks or so.
Like the US M67 90mm recoilless, repeated firing overheats the things. After firing five rounds from our 90's, we were supoposed to observe a half-hour cooldown period.
