Lb 4 lb $ 4 $ the best for what i needed it for. - CCI Ammunition AR Tactical .22 LR 40 Grain Plated Round Nose Brass Rimfire Ammunition

The S&W M&P 15-22 did not like any other ammo. Cycling was a major issue and I would not rule out some of that issue being the mags themselves. But once I switched to this ammo in conjunction with the Volquartsen competition bolt (bolt was not necessary but IMO but the spring and extractor plunger def were) I have not had any issues and I have at min 1000 rounds since. This is just good ammo and I will use this on all 22LR moving forward. Its worth the extra penny or 2 per round.