404 Barnes and Johnson Express

jruby

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I aquired an old FN Mauser - dated around 1951 . It is chambered in the above caliber. I have been fire forming brass for it from 375H&H brass - cutting it down and blowing the cases out with the cream of wheat method. It's. 411 caliber. I am finding very little information on this cartridge. I can think of very little purpose in North America for this cartridge other than to learn from it. Does anyone know anything about this round including reloading data. Everything I find says to use IMR 4320 which has been discontinued for several years. Are there any books that discuss this cartridge? Can I use 416 Taylor load data?
 

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Not quite sure how to tell.
What's the distance between action screws? 7.75" = standard length action. Is there a stripper clip slot on top of receiver and/or left hand thumb cutout on left side rear receiver? Both of those would indicate a military surplus standard length Mauser action rebuilt to take magnum cartridge. Nothing wrong with standard action rebuilds. Actually, some hunters prefer them because they have shorter cycling. Magnum length action = worth more. Why? Good question. I don't have an answer.
 
What's the distance between action screws? 7.75" = standard length action. Is there a stripper clip slot on top of receiver and/or left hand thumb cutout on left side rear receiver? Both of those would indicate a military surplus standard length Mauser action rebuilt to take magnum cartridge. Nothing wrong with standard action rebuilds. Actually, some hunters prefer them because they have shorter cycling. Magnum length action = worth more. Why? Good question. I don't have an answer.
This is an FN commercial mauser action
. No thumb cut or stripper clip slot. The action is marked 1951. I am guessing it is an early commercial action. I will post some pictures of it.
 
I received a bunch of old Barnes bullets with rifle. Are these any good?
 

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I received a bunch of old Barnes bullets with rifle. Are these any good?
They might be collectible. Caliper the bullets and make sure they aren't 404 Jeffery. Neither cartridge is actually .404 caliber. If they are correct caliber, I see no reason why you can't shoot them. Unless you may want to see if they'll bring a collector's interest. Don't throw the boxes away. If it says 404 B&J on the box, I'd be surprised they're not collectible. That gun is a wildcard wildcat. An interesting piece of history.
 
I was thinking about using Barnes 300G TSX bullets that are .411 diameter - I think they were made for the 405 Winchester for a hunting load here in the states. I feel that I can get several hundred fps better velocity out of this rifle than the 405 Winchester - you think the TSX's would hold up?
 

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