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saskie's picture
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Location: West Carleton, Ottawa, Canada
Joined: 12/23/2002
Posts: 1264
12ga slugs

I need some info. Let me start off by saying that changing the configuration I'm about to describe is flat out not an option for this year...I'm stuck with what I have...which is:
12ga smoothbore; Winchester Super-X 2 3/4in; 1oz rifled slugs. It's a very reliable, stable combination in my gun. It groups really tight and I know it drops 10-12in at 50yds. Not a problem - if hold right on top of the deer's back I'll be in the kill zone no problem.

Here's the problem where I hunt 50yds will be the absolute longest shot I'll have - most will be 20-30: My local range only goes down to a 50yd firing point - so I have no idea what trajectory it takes - I just know where it will be at 50yds but have no clue where it will be at 25. Does it lob up and then back down? down? - Does shoot flat and start to drop? Anyone familiar with the ballistics? Winchester's info just gave the muzzle velocity (1600fps). Little help?

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Location: Florida,USA
Joined: 08/21/2003
Posts: 1585
12ga slugs

Saskie you dont say what kind of sights you are using.
Barrel is smooth bore so I'll assume you are using the beads type sights. If this is the case then most likely there is no arc in the trajectory. Your slug starts heading toward the ground as soon as it leaves the barrel which means you'll be somewhere between 0" drop and the 10"-12" drop you have at 50 yards.

I am no expert in ballistics so I don't know the proper formula to find where your slug might be at 25 yards if its at negative 10"-12" at 50 yards.

saskie's picture
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Location: West Carleton, Ottawa, Canada
Joined: 12/23/2002
Posts: 1264
12ga slugs

Yep - plain old bead sight. I looked into getting tru-vis or similar installed but since it's not a vent-ribbed gun, can't do it. And to have it drilled and tapped would cost more than the gun is worth. I'll make do for this year, next season I plan to have a smoke pole so I won't have this problem.

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Location: Southeast Washington State
Joined: 09/28/2004
Posts: 117
12ga slugs

I've heard of someone epoxying a rear sight on the barrel carefully and using the bead front. I guess it can be done if you are skilled enough. Using only the bead sight with slugs, the sight radius is quite relative. I suspect your sighting the bead over the top of the barrel, which usually puts the muzzle low like JTapia says. There is still an arc in the trajectory, but it isn't breaking your sight plane, which accounts for the significant drop at 50 yards. The drop is excessive, for that load at that range, which also indicates how your sight picture is not working as for a normal rifle sight. I suspect your muzzle is actually pointed downward and the slug is at a negative trajectory from the moment it leaves the barrel.

If it were me, I would try and Macgyver something stable but temporary to the rear of the barrel that would work as an acceptable rear sight. That would change your eyeball's alignment with the bead sight and force you to raise that muzzle just enough to be dead on at 50 yards. So sighted, your rig would be deadly effective at any range between 0 and 70, with perhaps no more than 1 inch high at the peak somewhere in between and maybe less than 1 inch low at 70.

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Location: Sunny San Diego
Joined: 09/02/2003
Posts: 165
12ga slugs

SECOND THAT NOTION... I've got two beads on mine and when I line them up I can hit the gong at about 80-90 yards.

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