After posting on an other forum about the accuracy of cci mini mags,I decided to measure the rim thickness of cci standard vel and mini mags. I have a rim thickness Gage put out by Border barrels ltd. The cci standard was extremely uniform, the mini mags were all over the map. When my son shot 3p competition I would spend hours sorting ammo by rim thickness and weight. The mini mags are a great hunting round but they have no place in competition.