M1 Garand shooting way high

[penguin0123]

With the rear sight bottomed out and a "cut the target in half" hold, my CMP service grade that shoots to point-of-aim at 200yd with HXP M2 ball, and 400yd with M72 match duplicate loads (175gr OTM/BT, 46gr IMR4895, CCI #34).

[Edit:] I have my rear sight set as low as it goes, e.g. the aperture is bottomed out. It stays in that position for the following shots: With HXP, POI = POA at 200yd. With M72 duplicate, POI = POA at 400yd. So with the M72 duplicate, impacts are ~1.5 ft high at 100yards.

The front does not look milled/filed. Have any of you see a Garand that shoots that high? What is the typical front sight height? Know where I can find a tall front sight?

[Armistice]

By "bottomed out" you mean it's all the way at the rear, right?

[penguin0123]

By "bottomed out" you mean it's all the way at the rear, right?

Yes. Aperture is as low as it gets.

[highpower790]

the rear sight is all the way down...try a national match front sight.

[Armistice]

Nevermind, I was mistaken in how the sight moved

[ducky_0811]

I'm not quite sure I understand. Are you saying you have 2 M1's, one of which shoots to point of aim with HXP and your reloads, and another one that shoots really high? Or that you have a cmp service grade and it shoots point of aim at 200 and 400 but high at 100?
Need a bit more info man.

[highpower790]

One rifle...two different loads and change of rear sight setting in relation to height of front sight.

[ducky_0811]

So if I understand this, the rifle shoots to point of aim with HXP at 200 yards but with your reloads at the same distance you have to change your sight setting to 400? In any case, I would totally expect to see an impact shift with two different loads. Especially if they are 25 grains different in bullet weight.
In my experience a six o'clock hold works best with the M1, I may be wrong, but I believe that's what the rifle was designed to use.

[highpower790]

OP mentions nothing about changing rear sight setting from same yd line.what is said is rifle shoots to point of impact at 200yds with hxp,and400yds with M72duplicate.I can infer then that OP is shooting at 200yds and 400yds.

[penguin0123]

what is said is rifle shoots to point of impact at 200yds with hxp,and400yds with M72duplicate.I can infer then that OP is shooting at 200yds and 400yds.

Yes. Sorry for the confusion.
I have my rear sight set as low as it goes, e.g. the aperture is bottomed out. It stays in that position for the following shots: With HXP, POI = POA at 200yd. With M72 duplicate, POI = POA at 400yd. So with the M72 duplicate, impacts are ~1.5 ft high at 100yards. OP edited to clarify.

In my experience a six o'clock hold works best with the M1, I may be wrong, but I believe that's what the rifle was designed to use.

I prefer "cut in half" hold as it doesn't matter what size the target is. I know my impact will be at the edge of my front sight blade. With the 6 o'clock hold, the impact is a fixed __ MOA above the front blade, but the actual vertical distances changes with range to target. Works ok if you're using a standard set of targets like at a CMP match, but requires some mental math when shooting random objects like a steel animal silhouette, or a manhole cover. Just my personal preferences only.

[ducky_0811]

Ah, I understand now. Sorry if I just made things worse, sometimes the Marine in me likes to over complicate things.

As for your ammo shooting that high. Is this a new rifle? Not to insult your intelligence, but have you checked to make sure the gas cylinder or front sight isn't askew somewhere? Or maybe your rear sight has a bind in the drum and isn't actually all the way down? Just brain storming ideas here for out of the ordinary fixes.

[kendog4570]

Do you have a hooded aperture? If you do and it is in a standard base it will shoot high. The proper NM base has a deeper hood relief cut so the sight can be depressed enough, and all apertures should be fitted at the bottom front of the rack gear to allow the gun to zero at closer ranges.
NM fronts are not taller, they are thinner than a service blade, tapered to appear the same width with maximum wind on the rear, and the width is designed to work well with standard short and mid range targets at the M1's sight radius. The M14 NM blade is narrower yet because the sight radius is less for the same reason.
The "cut in half" hold is what is known as a Navy hold, as opposed to a six o'clock hold or a flat tire hold. In real crappy conditions one might use a frame hold. They all work for different reasons, at different times, for different shooters. Knowing when and why to use them, and being successful at it is the difference between a marksman and a high master.

[penguin0123]

Ah, I understand now. Sorry if I just made things worse, sometimes the Marine in me likes to over complicate things.

As for your ammo shooting that high. Is this a new rifle? Not to insult your intelligence, but have you checked to make sure the gas cylinder or front sight isn't askew somewhere? Or maybe your rear sight has a bind in the drum and isn't actually all the way down? Just brain storming ideas here for out of the ordinary fixes.

I wish it were that easy.

The rifle isn't new and had 100+rds of HXP thru it and I only recently started trying the M72 duplicate load since the 4+MOA with HXP isn't terribly exciting.

The lowest setting hitting at 200yd with the HXP was ok since the NM course of fire starts at 200 anyway. However, the M72 duplicate shooting that high makes the whole affair somewhat inconvenient.

[Sailormilan2]

Measure you front sight blade and see how tall it is. Post it here, so some of use can measure ours and compare. You may need a taller front sight, as someone may have shorten the blade.

[penguin0123]

Do you have a hooded aperture? If you do and it is in a standard base it will shoot high.

I don't. As far as I can tell, it is GI. The front sight is the wide blade type. The rear aperture has the battleship grey park (not sure if that is significant).

I was benching the rifle with the front sand bag on the stock just aft of the front sling swivel. I did not sling up. Several other shooters confirmed the impacts, so chances of operator error is low.

Even then, POI moving that much higher when going to a heavier bullet seems funny... Maybe the heavier pill means slower velocity and the muzzle has time to rise more before the bullet leaves the barrel?