How Do I Zero M1 Carbine?
How do I zero my M1 Carbine for a battlefield zero? What distance were they zeroed for, 100, 200, 250, or 300 yds? Also, I only have access to a 50 yd. range. How high shoot it shoot at the zeroed setting?
For example, I know for a battlefield zero, an M1 Garand in .30-06 is supposed to shoot 1.25" high at 25 yds. Can't remember what its supposed to do in .308, but thats for another time.
When your Carbine was brand new, it was sighted-in at 100 yards with fresh GI ammo having a MV of 1900FPS.
The rear sight was first mechanically centered and then drifted to approx the correct spot for initial windage. The rear sight base was then staked in place. The front sight post was deliberately made high in order that it could be filed down (if need be) so that POI=POA @ 100 yds.
A LOT of Carbines have had their front sights switched out. If yours shoots low, then file the top of the blade holding the tip of the file nearest the muzzle down a little bit.
Do a little at a time, as it is easy to remove metal, not so easy to replace.
If your Carbine shoots high, then you will need a new, unaltered (high blade) front sight, and go through the same process.
I'm sure there is an intermediate distance at which you can zero for the equavalent of a 100 yd zero, but I don't know what it is. No doubt someone will be along shortly, or you could download a ballistics program that would give it to you.