I have a Vortex Viper PST 2.5-10 x 32 FFP on an ADM Delta mount that I've put on my SCAR17S for longer range shooting (prairie dogs, big game, ringing steel at 800-1,000 yards). I like the setup, but I've noticed when I go bunny hunting (smaller fast moving targets from 5-75 yards in sage brush), I have a hard time getting on target quickly due to field of view issues/eye relief, not to mention the ~24 ounces of glass and steel sitting on the rail.
I was thinking of putting a small red dot on a 1 o'clock mount, but I figured it would be better to take advantage of the QD/return to zero features of the ADM Delta mount. I bought an ADM22 mount to go with a Burris Fast Fire III that was sitting on another gun. I plan on swapping over to the Burris FF3/ADM22 combo for bunny hunting and other similar activities.
Now I'm wondering if there are any advantages to mounting the optic closer to the front or the rear of the rail.
I've searched online, and there really aren't any good answers - in fact there are some contradicting assertions of fact. Some experts say the dot gets larger the further away the optic is places from your eye, so keep it closer for more precise aiming or place it further out if you want faster acquisition at closer ranges.
The sight/mount combo is pretty light, so I really don't see the placement affecting the balance of the rifle that much.
Has anyone had any practical experience with this?