Your theory?

[Clint Shook]

So what is your theory as to why "every gun is a little different" when it comes to a good choke/shell pairing?  Let's assume we are talking same make/model/barrel specs.     

[Old Gobbler]

Identical guns -----Choke thread  alignment in the muzzle ....bore surface uniformity ....chamber alignment , length , and forcing cone geometry etc.....

[alloutdoors]

What Shannon said, basically just manufacturing tolerances. I suspect though that if you plotted the results for any given choke and load combo across guns of the same model you would get a bell curve type distribution. In other words, you would have a small percentage of outliers on either end but most would fall into a fairly consistent average range.

[MossRem]

Ditto to what everybody on here has already said (and said better than I could). Even with sophisticated technology and CNC machinery, gun companies still don't seem to be able to make two guns exactly alike. You can have the same model, same barrel length, same everything made on the same day, and there'll still be a difference.

[Bigspurs68]

All the above and I will add, barrell harmonics. Even the way you hold your gun when it is fired. 1100 fps is fast but letting a gun free jump will cause strange things to happen before the shot leaves the muzzle.

[memert116]

Man, you guys have said a mouthful......I have no doubt that you guys have forgotten more about guns than I will ever know....

[DirtNap647]

all of the above is correct ...well said

[allaboutshooting]

All the above and I will add, barrell harmonics.

In January of 2013 I published "Harmonics in Shotgun Barrels" which summarized my findings over 3 years of the effects of harmonics on shotgun barrels. It was to my knowledge the first such detailed study done on that subject. There has been much written about the effects of harmonics on rifle barrels but  nothing to that time about harmonics on shotgun barrels.

The effects may surprise you.

It's not light reading but for anyone interested in the subject, I can provide you with a link to the article.

Thanks,
Clark

[Clint Shook]

Send the link.  It's raining this weekend.  Thanks


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[allaboutshooting]

Send the link.  It's raining this weekend.  Thanks


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Here you go: http://allaboutshooting.com/article_info.php?articles_id=580

Thanks,
Clark

[Turkey Trot]

I'll read that article because I've wondered for some time what role harmonics play in shotguns.

I've particularly been curious about harmonics and having an HS monopod attached to the barrel, or having an Uncle Mike's magnum sling swivel system clamped to a barrel.

[allaboutshooting]

I hope you find it interesting.

Thanks,
Clark