I use two different dope card holders. One is a fabricated using a QD mount with limiting detents so the card does not spin in the mount; the other is a simple telescopic magnet that just happens to fit perfectly in std. QD mounts. Dope cards reside in Blue Force gear pouch mounted to stock, out of the way and always available for specific load and scope being used. Apologies in advance for old photo with Butler Creek caps.