I always load my mags on my Glock to full capacity but have heard if you store mags in your safe you should put one less in so your spring isn't maxed out, have no idea if it helps or not, open to suggestions.
I have a Colt Tactical and love it! Was going to buy a Smith and Wesson M&P because i wanted a light AR, But saw the Colt and it was just as light and it shoots great! I also own a Ruger 556 and it's a liitle on the heavy side but still shoots great and accurate, none of them has jammed or ftab.