With my two and only magazine pouches, both double and with flaps, the magazines from either of my two pistols can only be carried one way, back to back. They won't fit any other way. But I find the rearward facing magazine easier to use.
Shoot low, sheriff. They're riding Shetlands!
Underneath the starry flag, civilize 'em with a Krag,
and return us to our own beloved homes!
Buy War Bonds.