I bought a NIB Glock 17. It came with 2 - 10 round mags. This is strictly a range gun, I have other guns for carry. Knowing that this gun should carry 17 rounds kinda bugs me that I can only fit 10. But as a range gun, do I really need 17+1 capabilities? or is it just the idea of having those 17 rounds at my disposal w/o reloading?