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Hey all-

I know this is an old-type question but I haven't seen it come up here and I think this place is a deep well of wisdom and experience:

How much different is/should be the headspace for a 7.62 bolt gun (50's Israeli Mauser) vs a fresh 308 700 Remington?
They will each have their own brass and will not share.
Second question:
How long of a headspace is acceptable/safe on that old Mauser?

Bruce





"At the core of liberalism is the spoiled child — miserable, as all spoiled children are, unsatisfied, demanding, ill-disciplined, despotic and useless. Liberalism is a philosophy of sniveling brats."
-PJ O'Rourke
“It is just as difficult and dangerous to try to free a people that wants to remain servile as it is to try to enslave a people that wants to remain free."
-Niccolo Machiavelli

The trouble with fighting for human freedom is that one spends most of one's time defending scoundrels. For it is against scoundrels that oppressive laws are first aimed, and oppression must be stopped at the beginning if it is to be stopped at all. -Mencken
 
Posts: 4073 | Location: NV | Registered: October 06, 2011Reply With QuoteReport This Post
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IIRC, in theory,
none,

however

the 7.62 gauges and the commercial .308 gauges measure from a slightly different datum point, I think,,

I have USGI 7.62 gages and a commercial set,
the numbers (headpace lenght) is different on each, (as in both go gages have different lengths or measurement etched in them,)

I've dropped both in a M1A and the gun passed with each, (and showed roughly the same 'measurement' as in how much the bolt had left to close etc)

eta the mauser will have a more 'generous' throat and likely chamber as well



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Posts: 8932 | Location: Beach VA,not VA Beach | Registered: July 17, 2007Reply With QuoteReport This Post
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"eta the mauser will have a more 'generous' throat and likely chamber as well"

Can we define "more generous" for someone that isn't sure how many thousandths that might be between "okay" and "no way"?

Bruce





"At the core of liberalism is the spoiled child — miserable, as all spoiled children are, unsatisfied, demanding, ill-disciplined, despotic and useless. Liberalism is a philosophy of sniveling brats."
-PJ O'Rourke
“It is just as difficult and dangerous to try to free a people that wants to remain servile as it is to try to enslave a people that wants to remain free."
-Niccolo Machiavelli

The trouble with fighting for human freedom is that one spends most of one's time defending scoundrels. For it is against scoundrels that oppressive laws are first aimed, and oppression must be stopped at the beginning if it is to be stopped at all. -Mencken
 
Posts: 4073 | Location: NV | Registered: October 06, 2011Reply With QuoteReport This Post
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My advice is to purchase a good case gauge, I use gauges made by Dillon, if the shell passes, use it if not put it in the scrap bucket. Easy peasy, no sense trying to make a big deal out of it.
 
Posts: 16 | Registered: December 22, 2009Reply With QuoteReport This Post
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I have the RCBS precision mic for 308. No "pass" or "fail", just very precise measurements.

Bruce





"At the core of liberalism is the spoiled child — miserable, as all spoiled children are, unsatisfied, demanding, ill-disciplined, despotic and useless. Liberalism is a philosophy of sniveling brats."
-PJ O'Rourke
“It is just as difficult and dangerous to try to free a people that wants to remain servile as it is to try to enslave a people that wants to remain free."
-Niccolo Machiavelli

The trouble with fighting for human freedom is that one spends most of one's time defending scoundrels. For it is against scoundrels that oppressive laws are first aimed, and oppression must be stopped at the beginning if it is to be stopped at all. -Mencken
 
Posts: 4073 | Location: NV | Registered: October 06, 2011Reply With QuoteReport This Post
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quote:
Originally posted by RNshooter:
"eta the mauser will have a more 'generous' throat and likely chamber as well"

Can we define "more generous" for someone that isn't sure how many thousandths that might be between "okay" and "no way"?

Bruce


aenerous as in not a match chamber, ,
chamber diameter is not measured by head space,
neither is the throat,

remember, the rifles were made to work in all conditions, so they will not have a tight match type chamber,

as PHC mentioned, get a case gauge, dillon or wilson are fine, I have both,

and if you are worried about the throat, there are ways to measure that as well,

I use a bench rest die for 223 that I used for my service rifle ammo, very precise measurements for OAL, which you may or may not need for the MAuser


remember , headspace is the distance from the bolt head to the datum point on the shoulder for .308/7.62


re the Rem, it will likely have a more precise chamber, and likely a shorter throat, (meaning OAL will likely be slightly different depending on the bullet selected to reload



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Posts: 8932 | Location: Beach VA,not VA Beach | Registered: July 17, 2007Reply With QuoteReport This Post
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quote:
How long of a headspace is acceptable/safe on that old Mauser?

BTW, to answer this question,

the mauser should pass the Field gage,



www.chesterfieldarmament.com
 
Posts: 8932 | Location: Beach VA,not VA Beach | Registered: July 17, 2007Reply With QuoteReport This Post
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