Super extra disappointed with these. I bought 3 when Bimart had them on sale a couple of weeks ago. I loaded all 3 with 25 rounds and tried running them through a new 10/22 and would have a FTF every other round. No problems with the factory 10 round rotary mag. I was using federal champion 525 round value pack. Then tried Remington golden bullets. Both of these have been very clean and reliable .22lr rounds for me. They would work fine once I got down to about 12 rounds per magazine. But whats the point of them at this rate. I tried to be patient and let them break in. Loading 20-25 rounds in all 3 and limping through FTF over and over again. Not much fun for sure. I then googled butler creek hot lips and read several reviews that read very similar to mine. Huge waste of time and money. Anyone have a better alternative?