Colorado's 15 round mag limit was found "Constitutional" by U.S. District Court Judge Marcia S. Krieger. She said that there was no evidence that the magazine restriction reduce a persons ability to defend themselves. 50 pages found here.
https://www.coloradoattorneygeneral...4/06/26/062614_krieger_opinion_outfitters.pdf
https://www.coloradoattorneygeneral...4/06/26/062614_krieger_opinion_outfitters.pdf