.577-450 case insert

A

antiqueguy

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would there be any interest in some adapters to make .577-450 cases from belted magnum brass it would be a steel insert with the base dimensions of a .577-450(or snider) about 1 inch long that was reamed out to accept a belted magnum(.300 win mag,.375 H&H,.458 win mag ect) these would be formed but dies/fire forming into cases for .577-450
 
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mooncoon said:
it would seem to me to be a lot cheaper and more practical to form the cases from 24 guage Starline shotshell brass

cheers mooncoon
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magtech but those are balloon head cases that need to be full length resized every firing over working the cases solid head Bertram cases are about $8.30 each where an initial investment on a insert that's reusable and use cases you can get cheap(even cheaper than 24ga magtech).

this idea also gives a reduced capacity meaning less fillers needed and making it easier to load smokeless .577-450(can't do that with balloon head brass)
 
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So a fire formed mag brass would be used inside of a steel insert each time it is shot or does the fire formed mag brass somehow chamber with out the steel insert after fire forming?
 
HeadDamage said:
So a fire formed mag brass would be used inside of a steel insert each time it is shot or does the fire formed mag brass somehow chamber with out the steel insert after fire forming?
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you use unformed belted magnum cases put it inside the steel insert and form it once formed it is attached to the steel insert this assembly is fired together. once the brass part of the case becomes unusable you cut it above the steel insert and punch the rest of it out.

biggest advantage to these is you can use common brass that you can get locally
 
I happen to have a 45-70 adaptor ,but you still have to eject and load a fresh cartridge each time into it .Not too sure if your idea is different?
 
pmatuk said:
I happen to have a 45-70 adaptor ,but you still have to eject and load a fresh cartridge each time into it .Not too sure if your idea is different?
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the inserts use belted magnum cases to form .577-450 the brass case is attached to the steel insert until the brass part is not longer useable(reloadable) for multiple round you need multiple inserts
 
Unless you need full power loads, I think a better alternative would be to make a chamber liner and chamber it for a shortened 45-70 shell. I posted details some time ago but in a nutshell, the neck of a chamber liner is quite thin and a full length 45-70 will cause a pressure ring if the liner is a bit loose in the neck area. That makes the shell difficult to remove. If you stop the chamber in the shoulder area of the liner, the pressure ring does not occur and the shells are fairly easy to remove. Even though the slugs are significantly undersize, using bullets with 5% alloy will allow them to obturate and accuracy should not be too bad.



I did make up some steel cartridge bases like you are suggesting, for a dutch beaumont rifle, because I did not want to buy basic brass, but it was a lot of work and the rim of the 45-70 shell has to be turned smaller in order to leave some metal for the steel rim of the composite case. The method works but it is not an easy fix







cheers mooncoon
 
mooncoon said:
I did make up some steel cartridge bases like you are suggesting, for a dutch beaumont rifle, because I did not want to buy basic brass, but it was a lot of work and the rim of the 45-70 shell has to be turned smaller in order to leave some metal for the steel rim of the composite case. The method works but it is not an easy fix







cheers mooncoon
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this is exactly what im talking about except .45-70 cases would not work as they are too short they would work for .577 snider though im going to have a few machined for me to try out just wanted to see if there's any interest
 
mooncoon said:
Not much to tell. I bought it several years ago from someone on gunnutz and shot it for a while but got bored with it and traded or sold it. Other than that I don't remember much about the gun

cheers mooncoon
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I like the engraving style: classy, not 'pimped'.
 
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