"Match" Chamber?

[bill123]

What you got from the other maker was not BS, once fired brass from an other chamber is one of the biggest wastes of money and accuracy I can think of!
Brass that fits your chamber so perfectly that it's just moving a couple thou and springing back after each fire and size cycle brings a level of consistency you will not achieve with brass that has formed to another chamber unless it's a smaller chamber really either by luck or actually building a fire forming barrel.

If u used fired brass from another gun, size it, fire it, isn't it now formed to your chamber?

 

[HARPERC]

I expect a smith to use good reamers to their best capability. If they wish to call it match OK by me.

Never had any success moving brass around rifle to rifle, factory or "match".

 

[L.Sherm]

No it's not, I've seen reamers of the same caliber .003 undersized at the .200 line.
If you shoot brass in a chamber that was bigger and then try to shoot it in the one that's smaller your gonna have problems even using a FL die. Small base die may work may not. All dies dont size brass the same either.
As far as I know 6.5x06 isnt saami that I'm aware of. I agree with bigngreen for the most part I'm not a saami reamer fan either seems like they either have a crap load of freebore (6.5 creed, 204 ruger) or not enough the Nosler saami reamers are a good example. I'm getting ready to bed a 6.5x06AI for my nephew and start fireforming and load development using necked down 30-06 Lapua brass. I had JGS make the reamer with .130 freebore and .297 neck. O6 brass has a long neck so it doesnt require alot of freebore for the 140 Berger to be seated just above the neck shoulder junction.

 

[bill123]

Never had any success moving brass around rifle to rifle, factory or "match".

If you can fire form one cartridge into another (eg: 6BR to 6 Dasher) with good results, why can't you fire form from one 6 Dasher barrel to another 6 Dasher barrel. I'm not talking about constantly swapping brass from one rifle to another. I'm more thinking one barrel wears out and you use the brass from the old barrel in a new barrel. If u size it and shoot it once, the brass is going through a lot less stress than if you fire formed from one cartridge to another.

 

[L.Sherm]

If both barrels are chambered with the same reamer it will probably work. New brass is undersize and formed when fired whether 6BR or Dasher

 

[Aldon]

If accuracy is a concern and your worried fireforming brass may impact the new barrel, i'd find a cheap donor set up and have you smith build a similar set up with same reamer to fireform new brass..

 

[L.Sherm]

Another example is different brands of brass are not all made to the same dimensions. 221FB Lapua brass is made bigger at the .200 line than say Rem, so if you have a 20VT reamer that was made to the older 20VT prints that were designed around Rem brass and use Lapua you will probably have clickers.

 

[Edd]

........As far as I know 6.5x06 isnt saami that I'm aware of. .....

 

[bill123]

If both barrels are chambered with the same reamer it will probably work. New brass is undersize and formed when fired whether 6BR or Dasher

If I size a piece of brass, isn't it meant to fit in any chamber of the same caliber? If I take a piece of brass fired from one barrel, once sized and fire formed in the new chamber, isn't it just as well formed as it would have been in the old barrel?

 

[TX Badger]

My 260ai from criterion is a match chamber. It was also explained to me that this version had a longer throat for heavy vld match bullets. Nothing was mentioned about it being tighter. It shoots great though I do wish I had even more freebore.

One question, if you are building a rifle that requires you to form brass, why not go one small step further and make it an AI? More performance, longer brass life...

 

[CaptnC]

What you got from the other maker was not BS, once fired brass from an other chamber is one of the biggest wastes of money and accuracy I can think of!
Brass that fits your chamber so perfectly that it's just moving a couple thou and springing back after each fire and size cycle brings a level of consistency you will not achieve with brass that has formed to another chamber unless it's a smaller chamber really either by luck or actually building a fire forming barrel.

Match reamers means what ever they guy who spec'ed it thinks match is.
If you have a tight Sammi chamber and you buy brass out of a sloppy Sammi chamber your hooched, again!
I have only one Saami reamer, I really don't like them cause they are marginal for everything, that's the point, I use very specific reamers for specific reasons. IF I got it my pumpkin to use only once fired brass I'd have a reamer made based on what showed up for brass and what my sizer would do with it, more than likely add a little to the base and put the neck to .004 clearance and bring the throat down a little from most Sammi prints. I'd then headspace it a little longer so everything would be happy, happy but that'll never happen cause it's so much easier and cheaper to use new quality brass the first time.

I'm not saying I doubt what you say....

BUT....

I have seen it here dozens of times that it will at least three firings before your brass will be truly fire formed to your chamber. I don't have the tools to measure the entire case dimensions after each firing to know if it's true. But I've seen it stated by many highly respected members of this forum and the Accurate Shooters Forum. So I tend to think it possible.

If what they are telling us is true, the once fired brass didn't quite "fire form" and it will my chamber over the next couple firings.

 

[Edd]

This is the best advice you've been given.

bottom line until you see a reamer print, you do not know.
there are no standards nor specs for the word "match".
so ask for a chamber.reamer print or pass

 

[bigngreen]

It depends on the brass and how you push it and how much spring back you see. If the previous chamber was fat the brass will be fatter than if fired from a tight chamber just the way it is, even though it may drop right into the original chamber.

 

[Danny Butler]

Trust me on this one ... neck turning is a pain in the butt.... you will come very familiar with the dreaded donut...