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Sidelock
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In regards to things "gun", people who take tw to task may not be actual fools but their actions could certainly be viewed as ill considered.

Tha's prolly not just a JMO IYKWIM

have another day
Dr.WtS

Last edited by Wonko the Sane; 03/05/17 12:04 PM.

Dr.WtS
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The majority of 20ga o/u are choked ic & mod. But I don't think this one is. I think it is marked otherwise. If it actually choked mod & light full it would make it an unusual gun and beg the question why.

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Originally Posted By: pooch
The majority of 20ga o/u are choked ic & mod. But I don't think this one is. I think it is marked otherwise. If it actually choked mod & light full it would make it an unusual gun and beg the question why.


This reference is found several places on the net as Skeetx provided. miroku choke marks 26" barrels here as well. ymmv

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Thanks. I learned something today.

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Was the gun purchased new? If not are you certain that no one has opened the chokes on the gun.

As far as needing a bore gauge, for years I've successfully used an inside caliper and a 1" micrometer to measure bores and chokes. Typically when I've compared my measurements with a bore gauge they've been within 0.002" or less. The inside caliper is also excellent for measuring chamber lengths. You open it up in the chamber, slide it in until it's stopped by the forcing cone and then mark the length on the caliper with a Sharpie pen, pull it out and measure the distance with a ruler, very easy!

Steve


Approach life like you do a yellow light - RUN IT! (Gail T.)
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Rockdoc the gun was purchased before 1976 by someone who put it away for a long time as it is absolutely in like new condition. All I lacks is the box. I doubt it has been messed with at all. The typical scratches seen on the bottom of barrels from disassembly/reassembly are not there, not even one. I feel very fortunate to have found one in this condition. I will shoot it this week on a greased pattern board and know more about it then. I am going to have a recoil pad installed which will require little shortening of the wood to fit the grand daughter. After that she will begin the scholastic shooting program at the gun club this fall.

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Well I tried Rockdoc's suggestion to measure the constriction in the choke with inside calipers. After measuring the barrel before the constriction and getting a consistent .615" diameter I then felt around for the narrowest portion of the choke itself. Topo barrel measured .607 and bottom .611 this gives me 4 points of choke in the bottom barrel and 8 points in the upper. Pretty typical for skeet and improved cylinder in a .20ga so perhaps someone did open these chokes before. Have to see the pattern board results for sure now. Ideally I would have liked a skeet lower and light modified upper. Still won't be surprised if the gun throws an IC and Mod pattern with modern shells. These gun were produced before plastic wads became prevalent.

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Jerry,
Don't forget that the points of constriction for each choke designation would normally be less for a 20 ga. than for a 12 ga.
Karl

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