12" barrel patterns

Grodz

Grodz

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I am thinking of buying a Grizzly-12 shotgun, but after seeing the patterning for the Outlaw's 12" barrel, I'm concerned that the patterns from such barrels may be too sparse.

As an example, see the 40-yd pattern from the Outlaw posted by Geologist, about halfway down this page:
http://www.canadiangunnutz.com/forum/showthread.php?t=317084&page=11

I know that each shotgun/load patterns differently, but these patterns seem very sparse indeed. The Outlaw is listed on Canada Ammo's decription as having fixed Modified chokes. With that constriction, one would typically expect a pattern of approx 60% at 40 yds. That certainly doesn't seem to be the case in Geologist's picture.

That also seems to be the case in the 25-yd pattern posted by Jeeped on this page:
http://www.canadiangunnutz.com/forum/showthread.php?t=317084&page=14
Despite having 2 shots on the paper, there are some significant holes in that pattern. One would expect approx 95% patterns at that distance.

Because modern powders burn in approx 10-14" of barrel, the patterning results seen in these examples would seem to indicate that the powder does not completed burn in 12" barrels, and that the escaping gases disrupt the shot significantly.

Have other owners of short-barrelled shotguns (Grizzly, Outlaw, Backpacker, Dlask), experienced the same results?

Do tighter chokes (ex. in the Grizzly) result in better patterns?

It would be interesting to see pattern pictures from other owners of 12"-barrelled shotguns as well.
 
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I noticed looking at my Outlaw barrels from the rear that the forcing cone is almost non-existent - seem like a sharp wall where the barrel meets the chamber. Since I already have a reamer from an earlier project I'm going to try extending ( or creating ?) the forcing cone to see if it'll improve the patterns.
 
The sparse pattern at 40 yards is being exacerbated by the bead which is too low, causing the pattern to print higher than the POA which was the centre of the sheet. Had I aimed lower the pattern would have been better as evidenced by the improvement in the #6 shot density as you go higher up the page.

I will install a higher bead and then re-pattern with a larger sheet of paper so that I can calculate the true choke using a Lockhart gauge.

As an example, see the 40-yd pattern from the Outlaw posted by Geologist, about halfway down this page:
http://www.canadiangunnutz.com/forum...317084&page=11

I know that each shotgun/load patterns differently, but these patterns seem very sparse indeed. The Outlaw is listed on Canada Ammo's decription as having fixed Modified chokes. With that constriction, one would typically expect a pattern of approx 60% at 40 yds. That certainly doesn't seem to be the case in Geologist's picture.
Click to expand...
 
Geologist,
Thank you. I'd be interested in seeing your new patterning results.

Have you tried patterning the Outlaw at 25 yds? I get the feeling that this might be its maximum effective range with birdshot.
 
Grodz said:
Geologist,
Thank you. I'd be interested in seeing your new patterning results.

Have you tried patterning the Outlaw at 25 yds? I get the feeling that this might be its maximum effective range with birdshot.
Click to expand...

I only patterned OO buckshot at 25 yards. My gut feeling is that you are bang on that the max range with birdshot for grouse will be around 25 yards mas o menos.

Still it'll be a fun grouse/rabbit gun as the looks on the faces of the Fudds that I meet will be worth more than the $300 I paid for it! :cool:
 
I took my grizzly out the other day to do some patterning. I was hoping to see the difference between 3" and 2.75" shells, but no one had ANY 3" shells in town.

I took 10 shots at 24" x 24" pieces of cardboard. I was using federal #2 steel 2.75". The average pellet count from the 10 rounds was near 60%. A couple were around 52% and a few were up around 65%. so I would say 60% of the pellets in 24" x 24" at 40 yards is about average.

The patterns were relativly full. I did not notice any holes in the pattern that were similar for all the shots.
 
Sounds like the Grizzlys pattern as one would expect with Modified choke tubes, and that their patterns are better than those of the Outlaws.
 
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