RickBin, just thinking out loud. Could you use multiple SD cards. Just switch out when you change guns. I too bring several guns when I go to the range.

Browning X-Bolt .30-06
Leupold VX-3i 4.5-14x50 CDS

Tikka T3x Lite 308 win
Leupold VX-3i 4.5-14x50 CDS