Zeroed at 50, off at 100

7.62NATO · 11-07-2009, 01:51 AM

Hi All,

I just bought a used slug gun, a Marlin 512 Slugmaster, in very good condition. When I shoot it at 50 yards, all shots are pretty much centered as far as windage is concerned. When I shoot it at 100, all my shots are off to the right between 3-5" on a windless day, using a variety of ammunition. I am using iron sights, but at 100 yards I'm shooting at a massive piece of blaze orange poster board with black duct tape as my cross (in other words, ain't no way I can't see "X" perfectly).

Any idea what the problem could be? Could the barrel be bent?

Thanks!

vabyrd · 11-07-2009, 04:53 AM

Might be a little flinch, maybe let someone else shoot and see if the results are the same.

Big Z · 11-07-2009, 07:59 AM

Might need to switch your sabot slugs. Could be having problems with stabilization.

7.62NATO · 11-07-2009, 08:04 AM

I've tried a variety of slugs...I think 5 different types. I still get the same results. I know I'm not flinching; why would I flinch at 100 and not at 50? I don't have a problem hitting the 9 and 10 ring consistently with my M14 using irons at 100 yards.

If I get a chance, I'll have another shooter that I trust shoot a 3-shot group. It's just that sabots are SO expensive...I kinda feel nervous about letting someone else crap $10 out of my gun.

Any other thoughts?

sconnyhunter · 11-07-2009, 08:13 AM

Have you tried re-zeroing the gun for that distance?

Ridge Runner · 11-07-2009, 08:14 AM

at 50 yards are you slightly offcenter? could it be the way you percieve the different target during sighting?
try shooting the 100 yard terget just after dawn before the sun comes up, I'd bet its a optical illusion thing going on the way the target appears due to the way light reflects off of it.
RR

dpj1030 · 11-07-2009, 08:18 AM

HERES YOUR BEST ANSWER!!! Aim 3-5" to the Left then you'll hit right on the money. Its not rocket science. weeeeeeeeeee-hoooo!

Centaur 1 · 11-07-2009, 08:25 AM

Resight it at 100 yards, then see what happens at 50. Your shots are averaging 4" right at 100 the way it's set up now. I bet that when you get the windage zeroed at 100, that you'll be about 2" left at 50 yards.

7.62NATO · 11-08-2009, 08:56 PM

Quote:

Originally Posted by Centaur 1

Resight it at 100 yards, then see what happens at 50. Your shots are averaging 4" right at 100 the way it's set up now. I bet that when you get the windage zeroed at 100, that you'll be about 2" left at 50 yards.

Yeah, that's what I'm guessing will happen. The question is, why? Not sure if I wanna spend the slugs rezeroing for 100 though, especially since the rear sight is dovetail and those are a PITA to work with.

Dan480Man · 11-08-2009, 11:37 PM

Are you using a rest?
If so, shoot it from a standing position, or freehand sitting position at 100yds, and see how your groups look.