Free Choke Chooser™-Perhaps…


Submit a question to The Technoid, and IF we post the Q and A, we will send you a FREE Choke Chooser™, a $3.99 value. And an inestimable value if you start hitting those longer targets.

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Greater Yorkshire Pheasants


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Windy Pigeons with Gerwyn Jones


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Pigeon Decoying with Geoff Garrod


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Theoretical Choke Constriction


Dear Technoid:

I recently “acquired” a 16 ga. SxS and I’m wondering how to tell the choking. I do have an I.D. micrometer to measure bore size about 4″ to 5″ down the muzzle. Without getting into patterning to determine actual choke size, does the 16 ga. choke size (by name as opposed to number) change every .005″ as does the 12 ga.? Is there a standard or typical bore dimension for 16 ga.?

I’m guessing that the choke size would change at something less then .005″ since the bore size is smaller. I’m more curious then serious about this. A “general” explanation would certainly be enough to satisfy my simple-minded curiosity.

Your Loyal Subject,
Terry

Dear Terry,

A measurement 4″-5″ down the muzzle might not be enough. Some of those older chokes could be long. Still, you are probably OK.

Standard I.D. on a 16 gauge is .670″. As I have often said, choke is strictly based on performance. Whatever constriction will put 60% of a certain load into a 30″ circle at 40 yards is a Modified choke. If you keep the same choke, but change the shell so that it patterns 50%, you now have an Improved Cylinder choke. Obviously, this can drive your crazy. None of us have the time to pattern each and every load, so we just trust the manufacturer. A gun stamped “modified” probably throws a modified pattern with some shell, though it may not be with the one that we are using.

I don’ t know all the conventional choke I.D.s for the 16. I would guess thought that they are very close to the 12 even though the bore is smaller. If you are really fussy, calculate it out. I don’t own a 16, so I am not properly motivated.

Example: lets say that .020″ is the standard modified 12 gauge constriction in a .729″ bore. That means that the bore is constricted from .729″ to .709″ to produce your modified pattern. The same percentage reduction in I.D. area applied to the .670″ 16 bore should end up with your 16 gauge modified choke I.D.

It should be percentage of constriction that controls the pattern. At least that is close as I can come to a choke continuum. Shot column length may also be a factor (it is in the 410), but I don’t think it is a major one comparing the 16 to the 12. Anyway, this is my best guess and the price is right.

Boots off. Beer open.

Best regards,

Bruce Buck
Shotgun Report’s Technoid
(Often in error, never in doubt.)

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BT-100 Thumbhole


I am an amateur trapshooter and a confirmed Browning man. I currently shoot a BT99. I am considering a Browning BT100. Several decisions must be made. No 1 is stainless steel, is it practical, and most importantly, the thumbhole stock. While it looks impressive, and Browning says it is great none of my shooting buddies has one and I can’t get any input about it.

What are your thoughts on this?

Bob

Dear Bob,

I have never shot one of the SS thumbhole BT-100s. Of course, that doesn’t mean that I won’t put my two cents in.

I have had a few comments emailed to SR about some reliability problems with the BT-100. Was it the trigger? I forget as it was some time ago. Anyway, there weren’t too many complaints, but there were some. I have never heard anyone say anything bad about the BT-99. This thumbhole/SS bbl sounds like the rifle guys are designing shotguns. If you shoot your shotgun like a rifle, it might work.

I did shoot a thumbhole International Skeet gun in the ’70s for a while, but found that it positioned my hand more vertically than I liked. It also put more pressure on the web of my right hand on recoil than I wanted. Of course, that stock could have had a grip that was too vertical and been a bit short. Still, I would wait to see if the thumbhole stock catches on. It hasn’t in the first 100 years of trap shooting. I’m a Luddite by nature. Still, if you want to be first, be my guest. You may be a “Browning man”, but they don’t always get it right. Remember the Browning recoilless single barrel trap gun? Remember the Browning B-2000? Remember the Browning A-500? G-500? R-500? Uh huh. Sometimes a wait and see attitude is appropriate. Your BT-99 is a heck of a gun. If you buy the BT-100, don’t trade the BT-99 in.

As to the SS barrel, it probably doesn’t hurt anything. Flugmann (alias Caprinus) made an entirely SS O/U some years ago. They still may be in business somewhere in Sweden for all I know, but they didn’t catch on over here. SS is nice in a rifle because the new SS alloys resist throat erosion better than the standard steels so the barrels don’t wear out quite as fast. That has never been a problem with shotguns, so a SS bbl is an answer without a question. Still, if you find SS attractive, why not. I too am attracted to shiny things.

Best regards,

Bruce Buck
Shotgun Report’s Technoid
(Often in error, never in doubt.)

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Perazzi HT2020


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