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Post by billback on Aug 25, 2015 5:03:13 GMT -5
I just bought a used Mp 94 EAA rifle shotgun combination, I thought it would have choke tubes for the shotgun and it has none, how do I know what choke the shotgun barrel is? It is not marked anywhere on the barrel and I cannot find a owners manual for the gun , it is a 12 gauge over 7.57R
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Post by Mr. Polecat on Aug 25, 2015 20:59:57 GMT -5
Oh really! Not threaded for chokes? Hm! I thought all of them that were imported into the US were threaded!
You can probably measure it close enough with a vernier caliper. They make special expensive bore calipers, but a vernier will get you "close enough" to tell.
Is that the 7x57 MP-94 that was on gunbroker for the longest time?
I have a manual around here somewhere. I'll be back once I find it.......
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Post by Mr. Polecat on Aug 25, 2015 21:09:57 GMT -5
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Post by billback on Aug 26, 2015 5:19:57 GMT -5
I bought the gun from GunBroker, but I have no idea how long it was on there
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Post by billback on Aug 26, 2015 5:31:06 GMT -5
I looked in every iZH 94 manual and my Calber Rifle is not listed, it says the choke tubes are marked on the end with lines to know which choke it is but my gun has no marks, and no way to remove a choke tube with a tool.
You have all the same manuals that I found on the E AA website
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Post by billback on Aug 26, 2015 5:38:21 GMT -5
next question what choke should I have for shooting rifled slugs 12 gauge? If it is full choke like I suspect can you shoot rifled slugs out of it ?
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Post by Jack on Aug 26, 2015 16:18:39 GMT -5
The only way to be <i>sure<\i> is to pattern it. Use wrapping paper or such, maybe four feet square. Pin it up and fire at the centre from 40 yards out (30 for .410). Now draw a 30" circle around the densest part of the pattern. Count the holes within that circle. Cut open an unfired round and count the pellets in that. Divide the one by the other. Laborious, but sure.
70%+ = Full Choke
65% = Improved modified
55-65% = Modified
45% = Improved Cylinder
35-40% = Cylinder
As to full choke and slugs, with a modern barrel and full choke, most current thinking is that it's safe but less accurate than a lesser choke.
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Post by Mr. Polecat on Aug 26, 2015 18:44:51 GMT -5
next question what choke should I have for shooting rifled slugs 12 gauge? If it is full choke like I suspect can you shoot rifled slugs out of it ? If I were a betting man, I'd bet you a dollar that it's a Mod or IM choke. You can shoot modern rifled slugs out of anything up to and including a Full choke without hurting the gun. You'll get the best accuracy with something around IC choke, though. If it's Mod or IM, it won't shoot slugs too bad. Plenty good enough to kill deer. If you wanna look at the silver lining, at least you won't have to worry about your screw-ins getting loose and shooting out or messing up the barrel threads, right? 7x57 is a really cool old caliber, too. I'd been eyeballing that same gun for a while, but never dropped the hammer on it.  I think it will serve you well, even without a screw-in choke. Shoot it at some paper at your maximum squirrel range, and if there aren't any larger-than-squirrel-sized holes then hit the woods.  And it's good to know that some of them didn't come threaded for chokes. I shall fix my article forthwith. The threaded ones use a TruChoke thread pattern. If you really really want screw-ins, a friendly local gunsmith can probably thread it for you. They charge more for doubles though, not sure exactly what to expect there.  |
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I think it will serve you well, even without a screw-in choke. Shoot it at some paper at your maximum squirrel range, and if there aren't any larger-than-squirrel-sized holes then hit the woods. 
