besk
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Post by besk on Aug 17, 2014 19:28:52 GMT -5
I am new here so please direct me if possible to a thread on this subject if one exists.--I have tried to search this topic to no avail.
I have an older Stevens 22-410 in good shape. I would like to adapt a 20 gauge single barrel to it for occasional use. Has anyone tried this? A 410 barrel from a Stevens 94 will lock up on my gun but I want a 20 gauge. |
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Post by bigkelly on Aug 18, 2014 15:35:27 GMT -5
I dont think the 20 will ever fit--the centerline of the 20 will be above the 410 firing pin
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besk
Rank Stranger
Posts: 21
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Post by besk on Aug 19, 2014 19:44:40 GMT -5
I just received a 20 gauge barrel I purchased. It will fit the frame I have and appears to center on the frame. Unfortunately it doesn't lock up tight so I can't test it. On the other hand I have a 410 barrel from a Stevens 94 that locks up perfectly. Looks funny though.
I am thinking about having using it as a basis for a 357 rifle barrel. Has this been done before?
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Post by Mr. Polecat on Aug 20, 2014 3:34:07 GMT -5
I think it would be pretty hard to turn a .357 barrel that thin to sleeve the .410. And would a sleeve like that be able to take the chamber pressure? I dunno... I am thinking like maybe the biggest thing you could sleeve into a .410 might be .22 Hornet or somesuch?
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besk
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Posts: 21
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Post by besk on Aug 20, 2014 5:58:41 GMT -5
Wouldn't sleeve the whole barrel. Cut it off at the forearm catch and use it as a stub. This is done with Thompson Contenders fairly regularly.
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Post by cas on Aug 24, 2014 19:59:53 GMT -5
Older Stevens frame? No way. Same reason H&R won't fit Handi-rifle barrels to the old frames.
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besk
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Posts: 21
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Post by besk on Aug 26, 2014 19:15:21 GMT -5
The diameter of a 410 shell rim is .219 square inches and the max. pressure is 13,500 psi. The diameter of a 357 shell rim is .152 sq. inches. To have the SAME pressure force against the breach face a 357 shell can generate 19,450 psi. This is more than the 18,500 of 38 special +P cartridge but much less than the rated maximum pressure of a 357 magnum which is 35,000 psi.
I have examined a Stevens 94 receiver carefully. It appears to be identical to my Stevens 22/410 receiver except for the extra height for the 22LR barrel. If a 12 gauge barrel can be used on a Stevens 94 receiver it should be able to handle more total force against the breach face than a 410 shell. The diameter of a 12 gauge shotgun shell is .417 sq. inches with a rated maximum pressure of 11,500 psi. This equates to a force of 31,549 psi from a 357 magnum loading. Which is pretty good.
Perhaps that is why the 357 barrel (and 44 magnum) is available for the H&R SB1 shotgun receiver. (The SB2 receiver is used with more powerful rifle cartridge pressures.)
So I am pretty confident if I can hand load a .357 magnum case to 38 special +P pressures or a little higher things will be plenty safe.
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besk
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Posts: 21
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Post by besk on Sept 5, 2014 18:54:42 GMT -5
So far I have been able to install a 16 gauge barrel on my Stevens and it locks up tight. The firing pin lines up with the primer of a 16 gauge shell. Unfortunately, a forearm I have for the larger diameter barrel doesn't lock up. So I have to work on that.
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