Shotgun Pattern Test

PineCone

PineCone

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Max hits in a 6" circle:
Federal F130 4B Mag 34 pel, Extra-full#2 7,Full 4 ,Modified 3, Cylinder 3
Federal F127 4B Max 27 pel, Extra-full #2 5,Full 5 ,Modified 3, Cylinder 3
Winchester XB124 Unplated 27 pel, Extra-full #2 7,Full 6 ,Modified 5, Cylinder 4

12 Ga. 2 3/4 inch 4 Buckshot
Winchester Model 1200
40 Yards

Barrels, all brass bead sight.
Extra-Full #2 Screw-in 30" Rib
Full Screw-in 30" Rib
Modified 27"
Cylinder 19"

Coyote Kill Zone 6"
4 Hits in 6" Acceptable

I have more data on 8" and 10" targets but I couldn't figure out how to post a spreadsheet.

Conclusion 1: Only Extra-full and Full chokes got enough pellets ina 6" kill zone with all ammo brands

Conclusion 2: My 30" barrell (or me) shoots the most dense pattern 10" down and left of point of aim. I have to fix this.
PC
 
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Quote:
It's nice to see that some folks still pattern their guns. Thanks for sharing your results.



Double that! Thanks for the time and info! /ubbthreads/images/graemlins/grinning-smiley-003.gif
 
Hey Pinecone....before you accept those results you might want to try a different choke.
Although the tighter chokes improve patterns in bird shot to make a denser pattern...in most large shot it acts to open up the pattern by bouncing the large pellets together through the choke causing the pattern to open faster.

I have found that my best pattern with lead shot over BB size is obtained with a Modified, Skeet or Cylinder choke.
The larger the shot the more open the choke I use.

I hope I have given some pause for thought.
 
Quote:
Hey Pinecone....before you accept those results you might want to try a different choke.
Although the tighter chokes improve patterns in bird shot to make a denser pattern...in most large shot it acts to open up the pattern by bouncing the large pellets together through the choke causing the pattern to open faster.

I have found that my best pattern with lead shot over BB size is obtained with a Modified, Skeet or Cylinder choke.
The larger the shot the more open the choke I use.

I hope I have given some pause for thought.



That's generally been my experience as well. But, there have been a few fellows who have been reporting getting very good performance with 4B using some of the newer chokes in tighter constrictions.

I generally prefer using my 10ga when shooting buckshot and with 4b, it does the best with a .705" Terror choke.
 
Pine Cone,
Good on ya for taking the time to pattern. Now you know what exactly is happening out there when you pull the trigger. Your patterns can be much improved. Also the point of aim issue. A custom choke of a tighter constriction will help a great deal. Custom chokes are longer and have parallel tapered sides to more gradually constrict the shot load. Usually there is a wad stripping feature built in as well. Many of the very experienced shotgunners here use tight turkey chokes, as tight as .660" for No. Four Buck. I shoot a Kick's GT .660" on my Benelli M1S90 .12 gauge with 3" Federal Premium No. Four Buck with zero problems and great patterns to 50 yards. There are plenty more shotgunners here who use something from .660" - .680" for BB, Dead Coyote T-shot, and No. Four Buckshot. There is a lot of past discussion about shotguns, chokes, and loads, in the archives if it can be dug out with a few good searches.
 
Take GC's advice and get a choke in the .660 range. My .660 carlsons shoots everything from turkey loads on up to buckshot good.I have kinda settled on copperplated bb's for coyotes.I shot one the other day at 60 yards and it dropped dead.I misjudged the distance thought it was more like 50.
 
I think I have caused some confusion here.
My tightest choke is an Extra-full Extended Turkey Choke( .064 constriction, .665 bore)
NOT an Extra-Full (.040 constriction, .689 bore)
Hard to see in the photo.
I am satisfied with the pattern density but it hits at 7:30 and 10" off the point of aim.
I don't know why.
Too tight ?
Too open ?
Barrel not straight ?
Bead sight off ?
Choke tube off ?
Thanks for all the advice so far, gentlemen.
But I am not sure where to start correcting this accuracy problem.
The screw-in Full choke also hits down and left with this barrel.
Any advice ?
Thanks PC
 
It could be shooter error, not properly getting a stock weld, peeping over the bead, ect. Could be an improper fit, the gun just doesn't suit you. Or, it could be mechanical. Something like the barrel/receiver doesn't fit together just right. It is solved by either getting a gun that fits you so that it is a natural handling and pointing rig, or, putting sights of some kind on the gun. Sights can be open iron adjustable sights, or, a red dot/scope. A sighting device allows you to adjust point of aim with point of impact.
 


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