Just my opinion:  “Loose” mags in a pocket are at risk for picking up lint and other detritus that would not be welcome….a mag holster, even in a pocket, would be preferred I would think.  
I have owned R9’s and LWS 32’s for years.  Although I usually carry an extra mag, I don’t foresee a likely combat reload, specifically because those particular firearms are belly guns used at very close ranges.  If the 7 rounds loaded are ineffective at that range, the proximity of the assailant makes a reload unlikely especially with the heel mounted mag release.  A “New York reload” would certainly be a better option.  
If the distance is greater, the likelihood of an effective shot goes WAY down making a strategic withdrawal a very valid option.  When I think I may be put in a situation requiring aimed fire at 15 or more yards, I usually carry a P365 with a 12+1 mage and a 15 round spare.  A good knife may be the other strong consideration for a CQB “reload”.