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  #1  
Old 04-01-2012, 12:08 AM
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.410 and british .303 brass


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I read somewhere that the british 303 cartridge can be used in the .410 shotgun. I am very intereste in this. can someone assist me in this.. I wish to load buckshot, field bird shot, no slugs.. Thank you! Don Bell
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  #2  
Old 04-01-2012, 01:40 AM
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Welcome to the Forum

Glad to see you here and hope that you post often. I have never heard of using .303 British brass in a .410 so I cannot comment. All the best...
Gil
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  #3  
Old 04-01-2012, 08:05 AM
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I have never heard of this and what you are suggesting is VERY dangerous. The 410 maximum pressure is @13,000psi and the 303 is @45,000psi. What I think you heard and I have heard as well, but have never tried, is the making of brass 410 shotshell hulls from fireformed 303 British or 30-40 Krag brass. There are a few write ups on this online. You may have also been led astray by a conversion often made to SMLE rifles that convereted the rifle from 303 to 410.
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  #4  
Old 04-02-2012, 05:56 AM
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One problem is that after reforming or expanding the 303 British case it is a lot shorter than the 2 1/2 minch 410 shell.

You should do a search for brass 410 shells, there has to be a supplier out there that has them. And chances are cheaper than 303 brass.
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  #5  
Old 04-03-2012, 09:03 PM
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There is a ton of info out there if you search "410 brass hulls, or brass shells. Like this: http://www.endtimesreport.com/410reloading.html. An "intersting" site, to boot...
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  #6  
Old 04-08-2012, 04:02 AM
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.410/.303

Here's a picture:


The third one down is a reformed .303 British case. The bottom hull is a Magtech.
Using standard .410 plastic wads - which have to be cut back 1/4"- the hull will hold just under 1/2 oz of shot.
To do this conversion, you must anneal the .303 cases. Even with annealing, expect to lose 50% of the hulls to cracking at the neck/shoulder.
It may take more than one firing to completely reform the case.
The case head never blows out completely (same as when making .50-70 cases from 348 Winchester).
Other issues: different rim thickness and diameter - not all shot guns will hold the British hulls which have thicker rims and a slightly smaller diameter. Break open guns are best.
Patterns are OK in my gun.
Pete
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Last edited by Pete D.; 04-08-2012 at 04:07 AM.
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  #7  
Old 04-21-2012, 10:18 AM
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Back in the 1950's I used to shoot a lot of brass cased 410s. They were the only cases which would cycle efficiently in my Parker Hale, bolt action 303 rifle / 410 conversion. It is a long time ago and I forget the maker of the ammo. The choking on the shotgun was so tight the only way to succeed in getting anything was to shoot it at static targets like a rifle, so I used to spend hours laying under a hedge watching a rabbit warren for a likely target. Brings back many happy memories, thank you for reminding me.
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