Visit the SWFA.com site to check out our current specials. |
Forming brass for 6mmAI Advice needed |
Post Reply |
Author | |
8shots
Optics Jedi Knight Lord Of The Flies Joined: March/14/2007 Location: South Africa Status: Offline Points: 6253 |
Post Options
Thanks(0)
Posted: November/14/2011 at 00:38 |
Apparently a person can follow two routes to get brass for 6mmAI.
One is to use 6mmRem brass and fireform them.
The other is to use
What are the pros and cons of each method? Edited by 8shots - November/30/2011 at 05:13 |
|
Blackbird
Optics Apprentice Joined: February/10/2007 Location: United States Status: Offline Points: 284 |
Post Options
Thanks(0)
|
I don't believe that you can make a 6mm Ackley Improved case from a 7mm 08. I think that you meant a 7 x 57 mauser. If only Lapua would produce .244 Rem brass. Many mid-long range target shooters like myself would be chambering 6mm AI's to push the 105-115 gr pills.
|
|
billyburl2
Optics Master Extraordinaire Joined: January/08/2009 Location: Cottonwood, AZ Status: Offline Points: 4015 |
Post Options
Thanks(0)
|
The 7-08 and the 243 share the same brass, not the 6mm Rem. That being said, a buddy has a 6mm Rem that chambers and fires 243 Win ammo just as well as it does 6mm Rem...
|
|
If it is tourist season, why can't we shoot them?
|
|
Blackbird
Optics Apprentice Joined: February/10/2007 Location: United States Status: Offline Points: 284 |
Post Options
Thanks(0)
|
Then the 7mm-08 was the next factory produced round.
And finaly the .260 Rem was the last factory produced cartridge from the .308 Win case.
I'm sorry, but I don't think that what your friend is doing (putting a loaded .243 Win cartridge in a .244 Rem/6mm Rem chambered rifle) is safe. Yes, they are both 6mm caliber rifles, but the chambers aren't even close to being the same.
|
|
Roy Finn
MODERATOR Steiner Junkie Joined: April/05/2004 Location: United States Status: Offline Points: 4856 |
Post Options
Thanks(0)
|
The 6mm Remington is based off the 257 Roberts case.
|
|
8shots
Optics Jedi Knight Lord Of The Flies Joined: March/14/2007 Location: South Africa Status: Offline Points: 6253 |
Post Options
Thanks(0)
|
Yes , quite correct Blackbird. It should be 7x57 Mauser.
What I have gleaned is that Norma makes decent 7X57 brass.
The advantage of going the 7X57 route is that thicker case necks are achieved as apposed to fire forming 6mmRem to AI.
The brass must be full sized to 6mm, then the necks trimmed and then fireformed.
|
|
Roy Finn
MODERATOR Steiner Junkie Joined: April/05/2004 Location: United States Status: Offline Points: 4856 |
Post Options
Thanks(0)
|
Thick case necks are an advantage ? You might want to check with the guy who reamed that chamber for the Ackley round.
|
|
8shots
Optics Jedi Knight Lord Of The Flies Joined: March/14/2007 Location: South Africa Status: Offline Points: 6253 |
Post Options
Thanks(0)
|
Roy,
The case necks must be turned to 3 thou smaller then the chamber size. I am told that a 6mm Rem fireformed may have a thinner neck then a 7x57, which has been resized to 6mm and then turned to be 3thou smaller then the chamber size.
That is for a standard 6mm chamber, nothing funny on the smith's side.
So that was the start of this thread:
What are the advantages or disadvantages?
The advantage of a thick neck is longer case life. Edited by 8shots - November/30/2011 at 07:41 |
|
8shots
Optics Jedi Knight Lord Of The Flies Joined: March/14/2007 Location: South Africa Status: Offline Points: 6253 |
Post Options
Thanks(0)
|
So far I have picked up the following:
7mm necked down:
Advantage: thicker case neck with longer case life.
Disadvantage: two extra proses....full resize, then neck turn, then fireform.
|
|
Roy Finn
MODERATOR Steiner Junkie Joined: April/05/2004 Location: United States Status: Offline Points: 4856 |
Post Options
Thanks(0)
|
Well if you want a tight necked (hard to chamber) then, the 7x57 is your huckleberry. You may need to ream the insides of those necks to..ie bullet tension.
|
|
Post Reply | |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |