cutting the chamber
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cutting the chamber
Shiloh folks: my rifle is 'in the works' now, and I have a question regarding the chamber of my 45-70. Is the chamber cut so that a bullet can be seated out of the case, thereby proving more powder capacity? I lthink this throat is called 'free bore' or 'leade'. In any event, that is how I wish my chamber cut.
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Re: cutting the chamber
I would go with the standard factor chamber, it's a proven match winning design. If you want to seat a bullet out for more capacity try a Bufalo Arms tapered Money bullet. My .45-70 shoots the 459530M4 bullet quite well. I can hit 1284 fps in a 34" barreled .45-70 using a lightly compressed load of OE 1.5. I've used that load on gongs to just short of 900 yards with excellent results.
Chris.
Chris.
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Re: cutting the chamber
Thanks for that : I guess my question really is: how is the factory chamber cut?
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Re: cutting the chamber
Unless Shiloh has changed their reamer since I had my .45-70 build the case neck dimensions are .482" into a 45 degree transition at the chamber end into a 2 degree 30 minutes lead angle with .050" free bore.
The reason a dog has so many friends is because he wags his tail instead of his tongue.
"Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery"Winston Churchill
"Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery"Winston Churchill
- Lumpy Grits
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Re: cutting the chamber
I also say stay with the standard chamber.
BACO sells several moulds with reduced front driving bands, just for this reason.
Gary
BACO sells several moulds with reduced front driving bands, just for this reason.
Gary
"Hav'n you along, is like loose'n two good men"
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Re: cutting the chamber
Don't get a freeborn. It's a good way to ruin the resale value and make load development more difficult. Listen to the other posters.
Clarence
Clarence
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Re: cutting the chamber
Thanks all, for the advice.
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Re: cutting the chamber
the option of the 2.4" and 2.6" cases allow more powder.
keep safe,
bruce.
keep safe,
bruce.
ventum est amicus meus
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Re: cutting the chamber
At a minimum I'd have them put a 7 degree leade in it while they are cutting the chamber. Then you can shoot ppb's a little easier . You are the one who wants more powder space but cheaper brass. Just shoot patch to bore paper patch bullets and forget greasers altogether. bobw
bobw
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Re: cutting the chamber
I have just had a note from Lucinda suggesting the same, bobw...so it will be done.
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Re: cutting the chamber
Could a 45-70 reamer be used to extend the chamber to 2.4 by removing the rim cutter?
Just a thought.
Not really a support question but I thought while on the topic I would ask.
Keith
Just a thought.
Not really a support question but I thought while on the topic I would ask.
Keith
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Re: cutting the chamber
keith,
the gun would go bang o.k.
if you are sizing the brass you might work the brass more than using a correct reamer.
once the brass is fireformed, and it would have to form around 0.2" in front of the rim, if you are not sizing, you would probably not know the difference.
could the reamer be reground for the 2.4" case at a reasonable price.
if so you could consider making it for a case 0.010" shorter than 2.4" and never have trouble with short brass.
keep safe,
bruce.
the gun would go bang o.k.
if you are sizing the brass you might work the brass more than using a correct reamer.
once the brass is fireformed, and it would have to form around 0.2" in front of the rim, if you are not sizing, you would probably not know the difference.
could the reamer be reground for the 2.4" case at a reasonable price.
if so you could consider making it for a case 0.010" shorter than 2.4" and never have trouble with short brass.
keep safe,
bruce.
ventum est amicus meus
- desert deuce
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Re: cutting the chamber
Uggg, the chamber is The Heart and Soul of a rifle. If you don't really care what happens after the bullet leaves the muzzle then it doesn't matter much what you do to the other end of the barrel.
If you care about accuracy, nothing is more import than who chambers the barrel, how and with what. Because if that is not done correctly nothing else matters.
If you care about accuracy, nothing is more import than who chambers the barrel, how and with what. Because if that is not done correctly nothing else matters.
Sometimes you get the chicken, and sometimes you get the feathers!
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Re: cutting the chamber
Thanks Bruce and D.D.
I will leave it as is and P.P. or B.Seat.
Keith
I will leave it as is and P.P. or B.Seat.
Keith