I always carry a spare 33 round mag on my belt for a reload but download to 28. I run a mag with a +10 Taylor Freelance as my first mag loaded to capacity of 41 and load from an open bolt. This setup has worked quite well for me. I would carry a 17 with a +6 TTI basepad but the Taccom magwell that I have on my JP makes reloading the big stick easier for me.