I ran a quick test last weekend, just four mags with different brands I had on hand. The Federal Lightnings were the worst, didn't cycle well at all, gave up with half a mag still loaded. Remington Golden Bullets had a few jams. The CCI Clean poly coated had one. The Winchester Wildcats that my 10/22 absolutely hates actually ran flawlessly. All mags were loaded with 24 rounds, maybe that contributed to the problems.