What length do you keep your collapsible stocks set at?

[The_War_Wagon]

3 clicks out from the receiver, regardless of stock type or extension. I’m 6’4”.

THIS. I'm 6' 0", but "tactically-padded."

[Alpha-17]

On my SCARs, I use them with the #3 showing, or on the ACR-style stock, with three empty slots. If I'm shooting the 17S prone for a while, I tend to extend its stock out to 4 for a slightly more comfortable LOP.

[Sry0fcr]

It depends on the stock but, whatever's long enough to allow me to stabilize the rifle in my elbow joint one handed.

[1986s4]

I'm 6'5" and slim/lean build so all the way out for me. Which really feels handy to me since my arms are rather long.

[SteveL]

I have seven position A5 receiver extensions on all my rifles and run all my stocks in the #5 position. I'm 5'10" for reference. If I'm shooting prone I'll move the stock out to the #6 position. None of the Instructors I've taken classes from ever advocated running the stock collapsed or NTCH. I even saw Pat Mac correct a couple students' troubles by simply extending their stocks a few notches.

ETA: Several people have mentioned adjusting their LOP, at least in part, around their optic's eye relief. I set my LOP first, then position my optic for proper eye relief second. Measuring from the rear of the CH to the rear of the stock as the OP specified, the LOP for me works out to about 10 3/4". That way when I bring the rifle up to fire everything is where it needs to be. With the exception of ACOGs, which I don't particularly care for, there is no reason to set your LOP based on your optic's eye relief. If you put your optic on first in a random position with no rhyme or reason, and then adjust your LOP around the optic you're doing it ass-backward IMO because you end up adjusting yourself to the rifle rather than adjusting the rifle to you.

[RMike89]

If I run the stock collapsed or even an A1 , my nose will be halfway down the upper receiver. All the way out I don't have to struggle for NTCH

[GTF425]

Depends on the rifle, but whatever LOP allows me to achieve natural point of aim with the particular rifle. Some variables like eye relief, handguard length, and stock style effect this.

I'm not really set in stone one way or another, but generally find myself with the stock nearly fully extended.

[ST911]

"One hole out" or "Two holes out" can easily be different between a Colt waffle/CTR/B5 etc.

Kind of like calling for optic adjustments by clicks rather than by mil/moa.

[HCrum87hc]

I've never measured it, but generally, I run fully extended or one position in. I'm 6'2" with long limbs, so that usually works best for me.

[robbins290]

Always extended. Been carrying a full size rifle for so long. I am used to the long length of pull. I may extend the stock a notch or 2 when the temps are 20 or below.