Dddrees,
Even way back when, the High Standards were problematic when it came to feeding. BUT once you had mags THAT FED, one was usually OK. The tool is sold by Brownells to this day. You simply tweek the feed lips gently, until it feeds 100%. I was fortunate in that I shot for my States Natl Guard Team back in the early 70's. So I had access to VERY experienced Armorers, especially at the big shoots. If you had an issue you dropped off the gun. Then watched and waited as they fixed it in front of You. For FREE. I shot a short barrel VICTOR for timed and rapid fire, and bought 3 spare mags for it. Dropped it off with our Armorer and a week later got it back with five mags that still feed fine, forty five plus years later.
The M-41's were not without issues either. IIRC we were allowed a 2 pound trigger pull. Most were lighter than that rom the factory. So the Armorers had to work on the sear engagement to get it to 2#. I had a M-46 that was a State gun , that had maybe a 1# trigger if that. It was a 7" barrel gun and it worked well for ME. But couldn't really use it at registered Matches. I think they had given up on that 46 trying to get it to 2 pounds.
I really enjoyed NRA Bullseye back then. It's pretty much dying now. Even after allowing optics.