Thanks for playing! I believe that the newer guns in the shop upgrades provide more bullets per magazine. (im sorry i didnt display that)
All the guns in the shop are upgrades, the ACP giving you 10 bullets, 300 Magnum giving 4 bullets and so on.
Yep, its supposed to be somewhat a story-based game so i guess it could be a little overwhelming. :P
I appreciate the feedback, I'll make it a point to leave a description next time around!