Do you fight inside the ring or outside?

[USSA-1]

I agree, with the setup you have on the Ultimak rail, you probably aren't going to see much difference as the scope never really gets that much closer to your eye.

As I said before, it's about improving your performance. I wanted shooters to think about the placement of their optics and experiment with ways to improve their individual performance by moving the optic around. Find the way the works best for you. There is no "right" way.

Good shooting,
USSA-1

[oregonshooter]

I take it you have not timed the difference?

[USSA-1]

Yes, I evaluated the technique over several training sessions and competitive shooting events and it would save me anywhere from 1/4 to 3/4 of a sec. per target (depending on the distance between the targets.) More importantly for me, it not only saved me time, but I had better hits on the targets. I won't say the technique made me more accurate, but I got a better, longer look at the secondary target and I was able to get better hits.

USSA-1

[TehLlama]

A slight, almost negligible, but in rare cases applicable point would be how much FOV the tube itself occludes - would mostly involve the firing side peripheral vision, and the crescent hidded by the tube.

With my primary optic all the way back, I have a slight amount covered up that isn't seen by my non-dominant eye.
So, I would want to move it forward until that area hidden by the tube is covered by my other eye, which only requires an inch or so of movement for the optic. For a non-NTCH shooter, this is much less noticeable.

I end up with a compromise - most of the way forward on the receiver, because it helps with some of these advantages, but doesn't give me a tiny blind spot that I dislike, and is a rough middle ground between the far-forward easy to acquire dots, and more weight-practical rear mounting options.
I think this reason is why the front 1/3 of the receiver are most commonly used rail slots.

[USSA-1]

Yep, I notice the same thing. This is one of the reasons I prefer EOTech's over Aimpoints. I can mount them further to the rear with less obstruction and they have a larger lens to fight through.

USSA-1