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As the title say "Can I cut a sizing die with a finish chamber reamer ?"
The sizer die would just be for the one rifle
If I fractionally under sized the die blank would it size the brass down to under chamber size ?
This would avoid the cost of buying expensive obsolete reloading dies
I have heaps of 4140 32mm offcuts from my barrel maker about 150mm long that would be perfect for dies
Cheers
I’ve got a die here that was reamed with the same chamber reamer, not sure if they undersized the bore of the die though. I’d have thought the reamer would cut to the same dimensions, unless the wall thickness was on the thin side.
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I have a full length sizing die for my 6.5 made using the rifle's finishing reamer. It has also been electroless nickel coated to build it up a bit inside. It full length sizes my brass, but only just. It struggles. Maybe better to cut it with a roughing reamer and then hone.
Sorry, correction, my die is a body die and doesn't size the neck. I do that after full length sizing with a bushing neck die. Same overall result just 2 dies to do it.
Yes I'm assuming it will be the same as the chamber [B]but [B]I'm also assuming that the brass spring back would leave the loaded rounds pretty hard to chamberQuote:
Originally Posted by MSL
And because it will be for a single shot rifle there won't be any camming power to chamber a tight round
And because it will be an obscure round I won't have the luxury of a roughing reamer
Short answer is no but...
You can make a neck sizer die with a finishing chamber reamer. You need to machine the top out to accept neck bushes.
Reamers can be ordered in 3 sizes, rougher, finisher and sizing.
ok WHAT obscure round????????????????????????????
Finish your chamber then have the reamer ground for the die?
375 2 1/2" nitro express flangedQuote:
Originally Posted by Micky Duck
Yes that would workQuote:
Originally Posted by veitnamcam
But the reamer is only usable once as a chamber reamer
woohooo big boomer.Quote:
Originally Posted by akaroa1
Yes but its a one off obscure round isnt it? Otherwise get a die reamer as well.Quote:
Originally Posted by akaroa1
Big but not a full speed 375Quote:
Originally Posted by Micky Duck
Like I said you can use my dies, load up a heap after working up a load & send them back, I have 3 .375Ex & two more barrels coming one day .
I don't think you will use a lot after working up a load ?
Yes i willQuote:
Originally Posted by Scout
My farm is crawling with huge hares !
They take quite a lot of stopping and even the odd follow up shot
Lol, Ok, will keep a watch out for dies then !
Maybe you loan the dies back when I need them then ?
Unless you are running at fairly high pressures (unlikely) then all you need to think about is the getting the neck sized (a bit) so it'll hold a projectile - and you'll get sick of shooting it before your brass needs a full length size . . . .
I read an interesting post on a US website (maybe accuratereloading.com) where the poster machined a piece of steel using the chambering reamer and then had the machined steel piece heat treated to shrink it so that it could be used for resizing cases. I had a look on fabulous google and noticed this https://www.productionmachining.com/...heat-treatment
which goes into a bit of detail about shrinkage/expansion of steel during heat treating. I think a heat treat engineer would be able to recommend the right kind of steel and heat treat to make a resizing die using the chambering reamer.
make your die with the finish reamer then have it hard chromed. It can be deposited with great accuracy in thickness.
Could do all your roughing cuts to get the die close to size and then get the part nice and hot, and run the reamer. Maybe it will contract enough at room temperature to give the correct clearance.
Probably better to have some sort of layer put on it like other have suggested. Hard chrome would likely make for an indestructible die.
especially if you used SS as it expands a lot when warm. take it up to 100 degrees and it will have grown 0.05mmQuote:
Originally Posted by SixtyTen