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Parabola #594521 03/26/21 09:23 AM
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If you look at enough German proof marks, you will notice many that gave two different "gauges" shown by the marks. Examples include 12 and 13 or 20 and 19. The one in a circle is the size of the chamber and the other is the diameter of the barrel ahead of the chamber. Admittedly without checking, I think it is possible that a .410 bore chamber is around 36 ga. while the bore diameter, ahead of the chamber is around 67 ga. Seems reasonable to me- what say-you?
Mike

battle #594531 03/26/21 12:47 PM
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None of the 410s I own have enough metal on the barrel to bore to 32 ga. It would be a truly odd 410 that had enough metal on barrels to bore to that size.

When I have a desire for a larger bore than one of my 410s, I put the 28ga barrels on either my Parker Repro or my Merkel SL. Loads in 28ga can go down to overlap with the bigger 410 loads and up to overlap the 20ga. 28ga satisfies my occasonal "big bore" needs.

battle #594536 03/26/21 02:38 PM
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A bit off topic, but I recollect seeing that a few Model 1886 Winchester Lever Actions were factory made as 32-bore smooth bore repeaters.

I have no idea why, unless it was for trick shooting at Wild West shows?

Whilst of little practicality,it would be seriously cool gun to have. Has anyone seen or used one?

Parabola #594541 03/26/21 04:10 PM
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Don't see any mention of such in the Model 1886 chapter of Madis' The Winchester Book.

battle #594546 03/26/21 04:51 PM
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Originally Posted by Der Ami
Admittedly without checking, I think it is possible that a .410 bore chamber is around 36 ga. while the bore diameter, ahead of the chamber is around 67 ga. Seems reasonable to me- what say-you?

I keep wishing I could see Miller type one of his mathematical formulae posts in answer, but since he is no longer with us I will attempt.

The numbers I come up with don't bear that out, Mike. A .410 chamber diameter tapers from .4811" down to ..4630" just before the forcing come begins. Doing the math we get about 47 balls per pound at .4630", and about 41-42 balls per pound at .4811", so that would be saying the chamber bore is somewhere between a 41 and a 47 gauge. Neither is close to 36.


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Stan,
You didn't quote where I admitted to not checking.
Mike

battle #594605 03/27/21 09:31 PM
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I went back and corrected that, but I don't know why you would post a conjecture without first checking to see if it was right or wrong? I don't understand that reasoning, Mike. It's too easy to do a check first. Not trying to show you wrong, but to provide facts, that are so easy to obtain.

My best to you, Stan


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Stan,
Because my wife had just said my supper was ready. By the proof house charts 67.49 works out to .410" . Also from the charts, .481 is about 12.22 mm, which by the charts is between 41 and 42 ga. The answer to the question of why .410 shells would be called 36 ga would almost have to be conjecture, unless one of us did it or found documents showing why. This is like trying to explain why several cartridges with bullets from .355" to .401" are all called 38's, using only math.
Anyway, the fun is in respectful discussion.
Mike

battle #594648 03/28/21 07:27 PM
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Originally Posted by Der Ami
The answer to the question of why .410 shells would be called 36 ga would almost have to be conjecture, unless one of us did it or found documents showing why.

True in a sense, but then if it was conjecture it couldn't be shown to be "the answer", could it? I was only wishing to provide facts that showed what gauge the chamber would be. Nothing else.

I do respect you, and I also respect going quickly when the supper bell rings. There are few things that show a lack of appreciation for someone cooking a hot meal than to let it get cold before deciding to eat, IMO.

Hope y'all's bad weather soon ends. There's been a rash of it in my "sister state" recently.

Stan


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Stan,
Georgia shared the weather with us, Newnan Ga. lost a citizen also. Thanks for the thoughts.
Mike

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