How to solve Point of Aim vs. Point of Impact on bead sight shorty...

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grelmar

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This has probably been asked and answered before, but any suggestions would be appreciated.

I have a Grizzly 870 clone in 12.5". The point of impact is a good foot high over the point of aim with the bead sight. I'm moderately used to a full length shotgun with bead sight, and matching the point of aim with point of impact on a 26" or 28" barrel is no problem.

With the shorty, I can immediately see where the issue is. The bead is below the horizontal sightline of the the receiver, and this will be an issue with pretty much any short shotgun (and appears to be a fairly common complaint).

I can guestimate my elevation pretty well, and don't have too much trouble getting it on, except after I've been shooting something with a proper length barrel, then I blow a shot or two with the shorty before my muscle memory kicks back in.

So... What are my options?

I really want to avoid ghost rings or a red dot. One of the reasons I deliberately chose a shorty without them was because I wanted something with clean snag proof lines. A ghost ring or red dot setup would ruin that.

Any way I can "raise" the bead simply, or install a fairly low profile ramp that I could file to point of aim? The bead will unscrew, so is there something quick I could screw in to replace it? I'm partially tempted to fab something up in the shop, but I don't want to go full Bubba.
 
Get a taller bead or get a bead and pedestal hell you could even build it up with jb weld and fill till it hits where you want.
 
What I've done in the past with my 12.5" bead and will be doing on my 8.5" is to drill a blind hole in the bottom of a dovetail front sight to slip over the bead. It is usually necessary to file the top of the bead down because you can't drill deep enough without breaking through the sight blade. I epoxied this to the barrel using a laser boresighter to line it up. The flat edge that the sight blade protrudes from is levelled with the top of the receiver then the blade is filed to match POI to POA. When firing, the sight picture used is lining the flat of the front sight with the top of the receiver and the top of the blade is your POI. It works well and isn't bulky like GRS or RDS. It also doesn't cost $60 USD plus shipping like the big dot, and doesn't use tritium with no rear sight to line up on. Useless in the dark. The big dot is also super wide, like aiming a cannon with a watermelon for a bead. Most front sight blades are .070" which is narrower than your bead. A nice touch with such a short sight radius.
 
That's why Dlask barrels come with a raised blade sight. The shorter the barrel, the higher the sight needs to be. I had a DA 8.5 that was easily 2 ft high at 5o yds. But my Dlask 8.5 barrel was dead on
 
I was fortunate enough to have swapped out a 12.5 Dominion arms barrel on a wingmaster receiver and it was pretty mush dead on at 25 yards. I've had two 8.5" shotguns in the past and the point of aim and point of impact was not even remotely close. I've seen guys put the raised front post on and have good results.
 
I'm thinking I don't need to move it up much... Would something like this raise it to at least get it close:

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supernova said:
What I've done in the past with my 12.5" bead and will be doing on my 8.5" is to drill a blind hole in the bottom of a dovetail front sight to slip over the bead. It is usually necessary to file the top of the bead down because you can't drill deep enough without breaking through the sight blade. I epoxied this to the barrel using a laser boresighter to line it up. The flat edge that the sight blade protrudes from is levelled with the top of the receiver then the blade is filed to match POI to POA. When firing, the sight picture used is lining the flat of the front sight with the top of the receiver and the top of the blade is your POI. It works well and isn't bulky like GRS or RDS. It also doesn't cost $60 USD plus shipping like the big dot, and doesn't use tritium with no rear sight to line up on. Useless in the dark. The big dot is also super wide, like aiming a cannon with a watermelon for a bead. Most front sight blades are .070" which is narrower than your bead. A nice touch with such a short sight radius.
Click to expand...

This might be what I'm aiming for... Simple and elegant solution.
 
if it were me i would go to the range with the shotgun, a lighter and solder and a file. Couple drips of solder on the bead, take a slow well aimed shot to see where it hits, add or remove solder depending on impact on target. you could leave the solder on the bead if its perfect or you can measure it and look for something that is that size.
 
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