Thread: Can I fire form with an action and dies like this I'm

I'm thinking I can fire form up some brass with a sizer die less the decap stem
Screwed into a suitable action that's 7/8-14 thread

Screw the die down on to the bolt face
Screw down the die lock ring
Fire form away with good ear protection

Clearly the LE bolt action is no use despite being 14 TPI the barrel shank is greater than 7/8"

But a smaller action could be re tapped to take dies
Or a genuine 7/8-14 receiver thread action used

This might be a dumb question, but why not just fire form them in a action with a barrel chambered in the cal you are trying to form ?
Genuine question, no idea if its possible or safe

Just a thought, are dies not reamed slighty tight to allow for spring back ? Again I'm no expert just bouncing ideas

Originally Posted by dannyb

This might be a dumb question, but why not just fire form them in a action with a barrel chambered in the cal you are trying to form ?
Genuine question, no idea if its possible or safe

Not all chambers are created equal

Fire formed in dies or fired cases from another rifle sized sizes in the dies you have.
Measure very accurately a number of cases and get the specs for the chamber reamer you want to make
Allowing for the bore diameter and bullet and case mouth thickness and diameter to be sure the case will let the bullet go

When making custom chamber reamers I would like to be able to fire form new brass in the dies that will be used for the rifle chamber cut with a chamber reamer sized from those cases

Originally Posted by akaroa1

When making custom chamber reamers I would like to be able to fire form new brass in the dies that will be used for the rifle chamber cut with a chamber reamer sized from those cases

I truly have no idea, interesting concept though

Originally Posted by akaroa1

When making custom chamber reamers I would like to be able to fire form new brass in the dies that will be used for the rifle chamber cut with a chamber reamer sized from those cases

Ive read that 3 times now..and chicken n egg comes to mind.
you will be making a chamber reamer
you will be resizing cases /fire forming

you are going to cut the dies,with a chamber reamer...so you must have a chamber reamer to begin with
chicken and egg again

so IF indeed you are starting with a wild cat idea......a nearly standard cartridge,so again...if you make the reamer FIRST...then you can cut a insert chamber inside a solid metal .12ga sized rod/bank/insert and fire form to your hearts content,AND give same to recipient of rifle.
or keep them in bottom draw for whenever you need them....
it negates the need to fireform in die themselves but the insert will be eggzachary the same size as the chamber and the dies as all three will have been cut with same reamer.
hope that makes sence

Originally Posted by Micky Duck

Ive read that 3 times now..and chicken n egg comes to mind.
you will be making a chamber reamer
you will be resizing cases /fire forming

you are going to cut the dies,with a chamber reamer...so you must have a chamber reamer to begin with
chicken and egg again

so IF indeed you are starting with a wild cat idea......a nearly standard cartridge,so again...if you make the reamer FIRST...then you can cut a insert chamber inside a solid metal .12ga sized rod/bank/insert and fire form to your hearts content,AND give same to recipient of rifle.
or keep them in bottom draw for whenever you need them....
it negates the need to fireform in die themselves but the insert will be eggzachary the same size as the chamber and the dies as all three will have been cut with same reamer.
hope that makes sence

@Micky Duck
no he is going to make his chamber reamer based on the die so that the dies he has available perfectly size the brass for the chamber.
it's a great idea

the thing is with Sammi specs is it's a spec, so it has a max and a min.
factory chambers are bigger towards the max spec factory ammo towards the min spec.
so that its a guaranteed fit no matter the brands or makers
dies are somewhere in the middle. as when we are reloading, we can adjust the tolerances to fit our rifle.
i think what akaroa is planning is one step further again making a custom reamer based on his dies so that the tolerances are super close so the dies don't need to work the brass as hard.
well, that's what if got from the idea anyway. clever bugger if he can pull it off.

Robbie T modified a 303 to fireform .30 Gibbs and .25 Gibbs by screwing in a die and going "bang". A little fast powder and a wad. Way more convenient than faffing about the regular way, especially with oddball/awkward cases.

Originally Posted by 257weatherby

Robbie T modified a 303 to fireform .30 Gibbs and .25 Gibbs by screwing in a die and going "bang". A little fast powder and a wad. Way more convenient than faffing about the regular way, especially with oddball/awkward cases.

Ok he must have bushed the reciever then

I'm sure it's been done

So what standard action uses a 7/8-14 TPI barrel shank ?

So if you already have tools to cut chamber...just cut one in a lump of steel with required bits...nah scratch that.make chamber inserts for bakail.only needs to be die length.job done

Wildcat

Maybe you could turn the thread on a sacrificial die. Bush it if required.
Maybe find a p14/17 action as the thread size is up over an inch. Nice strong bolt/action and more meat for a bush

Originally Posted by csmiffy

Maybe you could turn the thread on a sacrificial die. Bush it if required.
Maybe find a p14/17 action as the thread size is up over an inch. Nice strong bolt/action and more meat for a bush

Ok
A bigger shank size would make the bush major and minor diameters further apart and stronger