aparently you can be 10 thou off and still be saami complient!

30-06 brass casehead can range from 473" to 463"!!! too sloppy imho how about keeping the brass between .473" and .470"

brass manufacturers are cutting costs by using less brass and are trying to save money by letting the tooling wear down so they start at .463" and change the tooling at .473" but most likely keep it undersize to save money n brass

give me spec or go to heck!

i thought they wouldn't be doing it to be cheap but turns out i am wrong.

accuracy, preasure and velocity suffer. it seems only norma makes brass to spec.

it seems today you have to buy the brass first than have the chamber cut to the brass lott to have a decent fit.

this is bad practice

is nothing sacred

we have the right to bear arms and damm it i want tight brass too

boomie..

DECAF

ALL brass is undersized in non-critical dimensions, it has to be to be assured it will fit into a small end chamber

the spec is generally -.003, not -.010.

quote:

30-06 brass casehead can range from 473" to 463"!!!

Some of the saami standards are based on very old cartridges designed back when holding those tolerances was more difficult. Check out the chamber to case head of the .303 British, an even older round. Such clearances plays hell with a small round like the .22 Hornet which has a lot of clearance for its diameter.
On the other hand for modern rounds to continue sloppy chamber to case neck and body fits can only be justified for dirt clearance and ease of manufacturing.

saami compliant is between 473 and 463!!!

o.k. no more cafeine today

BS.....I wasn't aware that there was .010 tolerance in case head.....I'd have far rather believed Jeff's comment about .003 tolerance.....can you copy a link to something to confirm this .010 tolerance?

i have secret sources

i will call saami to put the screws on tomorrow

I has some Rem Brass that was .009 too small in the rim and they (Rem Customer Service) told me it was in saami spec.

quote:

Originally posted by Dwight:
I has some Rem Brass that was .009 too small in the rim and they (Rem Customer Service) told me it was in saami spec.

thanks for the back up till my fact finding mission

30-06 case at base per SAAMI is .4698 - .008"
30-06 chamber at base per SAAMI is .4708 + .002"

Possible slop is .011".

Some companies will sell you 6.5X55 brass with the same head diameter as the .30-06 which I think is irresponsible.

The small 6.5x55 looks funny, but it still works.

quote:

Originally posted by lawndart:
The small 6.5x55 looks funny, but it still works.

Yeah, and I can go forever without cleaning.

a second source confirmed the saami is +0 and -.010 and within saami spec. 30-06 casehead can be .471 to .461 but most keep it within -.005

quote:

Originally posted by boom stick:
a second source confirmed the saami is +0 and -.010 and within saami spec. 30-06 casehead can be .471 to .461 but most keep it within -.005

If you are too cheap to pay SAAMI, then pay $2 and buy the used book "Handloading" by Davis with the SAAMI dimensioned and toleranced drawings up to 1980.

30-06 case at base per SAAMI is .4698 - .008"
30-06 chamber at base per SAAMI is .4708 + .002"

Most chambers and cartridges are at the bottom end of the allowable range. The Glock 40 S&W chamber may be as big as it can get, but that is the exception.

I ran into the same problem with 06 brass a few months ago too. All the new brass I measured was in the .463"-.464" range. I found some older brass and it was around .469". Total bs as far as I'm concerned. I do my best to cut nice tight match quality chambers only to end up with brass thats like having 4 different tires on a Ferrari. To answer your question, YES saami it too loose.

quote:

Originally posted by SWD:
I do my best to cut nice tight match quality chambers only to end up with brass thats like having 4 different tires on a Ferrari.

It's that helpless consumer feeling.