Mossberg Slug POI way high

[soterik]

I've got a Mossberg 930 with turkey barrel that has 1 front and 2 rear FO sight (made a JM model before they had them available).

Slugs are hitting WAY high. Birdshot POI is fine.

Adjustable sight is lowered all the way down and slugs still impact 10-12" higher than POA at 40 yards.

If it was just a couple inches I could hold a little low, but 1 foot is too much hold under.

How do get the POI lower? Bend barrel!? Replace sights? Take it to a gunsmith?

Thanks for the input.

[latech15]

Taller front sight or bend barrel.

[assaulter]

I've got a Mossberg 930 with turkey barrel that has 1 front and 2 rear FO sight (made a JM model before they had them available).

Slugs are hitting WAY high. Birdshot POI is fine.

Adjustable sight is lowered all the way down and slugs still impact 10-12" higher than POA at 40 yards.

If it was just a couple inches I could hold a little low, but 1 foot is too much hold under.

How do get the POI lower? Bend barrel!? Replace sights? Take it to a gunsmith?

Thanks for the input.

Taller front sight.

[soterik]

Any suggestions on a taller front sight?

Most shotgun front sights look like they are all about the same standard height.

I did find this one at MidwayUSA that looks tall:

http://www.midwayusa.com/product/671251/williams-fire-sight-set-universal-vent-rib-slugger-shotgun-fiber-optic-green

[co-exprs]

Have you put this on paper at 100yds? I used to zero at 50yds and then hold over at 100. Now I zero at 100 and hold under. Much easier. You might find that at 100yds it's pretty close to spot on.

[soterik]

Have you put this on paper at 100yds? I used to zero at 50yds and then hold over at 100. Now I zero at 100 and hold under. Much easier. You might find that at 100yds it's pretty close to spot on.

Thanks. You may be correct that it is "on" at 100 yards. And I may try and see if I can hit something at 100 yards. But I sure would rather be zeroed for around 50 yards since that is the distance I would most shoot slugs.

[ozdogg5]

I also have this same problem. My birdshot is spot on but slugs are a foot high at 25 yards. Before swapping to the 22" barrel, the 18.5 spx barrel was POI with slugs. If there is a front sight that people are using to compensate for this, please advise.

soterik, did you ever get this fixed?

[soterik]

Here is what I have found. First, I discovered that my shotgun didn't "fit" me. I was looking down at the top of the rib and therefore couldn't ever line up properly.

There is supposed to be a spacer kit included with each Mossburg shotgun. Mine didn't so I had to order one from Mossberg and they charged me for it. I put the spacers in to lengthen the LOP. This made a huge difference and now when I mount the gun it "fits" me great. I'm looking straight down the ribs, not too low, not too high. Get the spacer/shim kit if you don't have it!

The other thing I did was to take off the rear 2-dot turkey sight. It wouldn't line up properly because it sticks up too high. Using just the front bead is sufficient.

I got a cheap laser bore sighter and from what I can tell the barrel is straight and the laser points at the same point as the bead. So I'm convinced the gun is fine. The problem lies with me. Shotguns just fit different and aim different that rifles do!

I have shot a couple dozen slugs with it since and it is much better. At 50 yards at least I can hit within a foot of where I want. At 100 yards though I can't consistently hit a big piece of cardboard. Not sure where the problem is. Does anyone know if the slug is rising or falling between 50 and 100 yards?

Thats my update. Hope it helps and let me know what tips you can offer back. Thanks.

[T Bacus]

I have shot a couple dozen slugs with it since and it is much better. At 50 yards at least I can hit within a foot of where I want. At 100 yards though I can't consistently hit a big piece of cardboard. Not sure where the problem is. Does anyone know if the slug is rising or falling between 50 and 100 yards?

Part of the problem is that you still don't know were your gun is hitting. If the best you can tell us is "it hits within a foot" at 50 yards you really have no idea what your gun is doing.

My first question is, do you have a repeatable sight picture with your shotgun? There are people who can shoot slugs pretty well with only a front bead but it is very difficult for most to do so. Most guns will come equipped with a front bead and a mid bead. I really think this is the minimum sight picture you want for 3-gun. With my last gun the mid bead dead center in the front bead put me about 6" high at 50 yards and almost dead on at 100.

You need to get out and shoot your gun for accuracy. Set up a target at 25 yards and shoot 5 slugs, using exactly the same sight picture and aiming at the same point on the target for each shot. This will then tell us two things. Do you have a group? If all five slugs are not within a couple of inches of each other then you need to practice sight alignment and trigger control until you can shoot a consistent group. If the group is good, but no were near the point of aim then you need to look into more adjustable sights or barrel bending until it is close.

Once you can shoot a group at 25 yards and it is close to center then it's time to step back to 50 yards. The best target to use at this point is an 8" paper plate. Now repeat the above. Shoot for the center of the plate with five slugs. Your looking for a 4-5" group in the center of the plate, or a few inches high. If you can't hold a 5" group off-hand at 50 yards practice until you can. Once you're confident at 50 yards it's then time to step it back to 100 yards and keep your group in that same paper plate. Another thing, once you are shooting groups at 50 yards it's time to test several brands of slugs. Once in a wile you will have a gun/slug combo that is just not accurate, and you need to insure that your gun/slug combo is..

It's not hard to do, the problem is most shooters don't take the time with their shotguns to really learn to shoot slugs, after all, they are a small part of even the biggest match. However, knowing you can go into a match and make any slug shot they throw at you boosts your confidence level, and that ups your entire game. I hope this was helpful.

Tim

[soterik]

Thanks Tim. That is exactly the type of info I needed!

I appreciate the lesson.

I need to start closer (25 yards). Then work back from there.

The spacer kit fixed the LOP and enabled me to get the proper sight picture. Now I just need to learn to shoot it.

Birdshot is easy. I rarely miss. But slugs are an entirely different measuring stick.

I may post back for more help. Thanks again.

[T Bacus]

Birdshot is easy. I rarely miss. But slugs are an entirely different measuring stick.

Here's a little tip I've given out for years. Nobody ever won a match by being good at the easy stuff. Figure out whats hard, the things you don't like, and practice the heck out of them. Practicing to cut a half second off your time to clear a plate rack or a bank of clays is pointless if it takes you three shots to hit one plate at 60 yards with a slug. Same with pistol, all the practice up close is a waste of time if you can't hit at 50 yards. We've all seen a match were a particularly hard pistol shot has people taking 10, 15, 20 shots to hit one or two difficult targets. You want be the guy who is happy there is a 75 yard pistol target because you know you can hit it and most others can't.