I'm telling you this as testiment to the flexibility of the sight setup.
First,I'm comfortable with the idea of changing units.Meters,yards feet.MOA,mils,cubits,hummingbird wingspans,it does not matter.I can work with it.
My latest is a 10 in bbl AR pistol in 300 blk. I'm using a rear sight that is a commercial verson of a cut off removable handle sight.Front sight is a clamp on fixed tritium Daniel Defense mounted on a forend rail. Its set back a couple of inches to leave real estate for an upside down handgun laser/light mounted forward top.
Point being,sight radius and cartridge trajectory mean NOTHING about the military setup will match.
My front tritiun sght,I can only see the tritium when it directly faces me. that means any front sight adj is a full revolution. One late night I think I figured thats a 7 MOA adjustment at the front sight. OK,no sweat. Its a coarse adj that will get me on the target paper. I won't use it out in the world.
I confess,I have not done my range work yet.
I have a chronograph,an excellent Kowa 77 mm fluorite lens spotting scope (I just do not need to walk downrange to well past 300 yards.On just the right day with the right lighting,I could see 30 cal bullet holes in a black bull at 500 yds. 300 plus is no problem.I have a Leica laser rangefinder ,a Kestrel wind gauge and ballistic software.
So,boresight,close target to 100 yd zero,I can turn the rear elevation drum to get a 100 yard zero on the 100 d target,real world.I write down how many clicks of unknown value(at this point) the 100 yd zero is up from bottom.
Now,depending on how much time I have,I might move to a lasered 200 yd target. Zero at 200 yds,relying on my spotting scope to walk them in.
Record the clicks in my data book.
Repeat for as many range increments as I have time for that day,writing everything down.
Now what do I have? Actual downrange targets to measure POI change on target per click. Thats my real world results,recorded. I just don't care what its "'supposed to be"
I know my velocity.I know the ranges.I know the sight height. Within the ballistic software,I can adjust the advertised BC of my 125 gr Ballistic Tips or whatever I'm shooting to calibrate the advertised BC to a BC that matches my real world results as I tested and measured them.
I now have an idea of what my "click value is,the dope to repeat 100,200,300,etc in elevation clicks up from bottom,and enough verified inputs to make the ballistic software work.
I can make a little "Cheat sheet" and attach it to a sling or the top of the buffer tube with clear shipping tape or whatever works better.
Yes,with the short sight radius,the click value will be different. Coarser. Maybe 2 MOA. OK.
This gun has no "brace". Just a buffer tube. 300 blk at about 2000 fps.
The gun's job is not much different than an M-1 Carbine. Its not intended to be a sniper rifle or long range prairie dog gun. Ican certainly test the small aperture to see what the results are and know what ranges to use it.
I could use the same process for 5.56 gr 75gr Hornady BTHP s and a 20 in bbl at 2800 fps.
The sight is a tool,like a micrometer. I can test and record results,and use the data.TheGarand sight does a fine job of giving 1 MOA per click. If it was a "Tanker Garand" with lower velocity and shorter sight radius, No problem!! Shoot with known parameters and record results.
They call that Dope.