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Model Seven Unknown caliber #15956268 03/30/21
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Smilner01 Offline OP
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I purchased a Remington Model Seven that was sold as a 300SAUM. It has a factory barrel that originally had iron sights (can see where the tapped holes were filled) and the barrel has been fluted (and in doing so the caliber designation must have been obliterated) and will NOT chamber a 300SAUM. The bolt is a SAUM boltface, and the best I can mic the muzzle is with my digital gauge is .270 so I think it may be a 7mmSAUM. what do I need to do to be absolutely sure? Cast the chamber with Cerrosafe?

BP-B2

Re: Model Seven Unknown caliber [Re: Smilner01] #15956313 03/30/21
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smithrjd Online Content
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Chamber cast would tell the story.

Re: Model Seven Unknown caliber [Re: Smilner01] #15956332 03/30/21
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Smilner01 Offline OP
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Can I cast the chamber while the barrel is still on the action or does it need to be pulled?

Re: Model Seven Unknown caliber [Re: Smilner01] #15956578 03/30/21
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BangPop Offline
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It can be done without pulling the barrel.

Re: Model Seven Unknown caliber [Re: Smilner01] #15956948 03/31/21
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ShortMagFan Online Content
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Could also be a 6.5 rem mag

Not many more options for a factory barrel

IC-A

Re: Model Seven Unknown caliber [Re: ShortMagFan] #15957896 03/31/21
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Smilner01 Offline OP
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Originally Posted by ShortMagFan
Could also be a 6.5 rem mag

Not many more options for a factory barrel


It measures larger than 6.5 at the muzzle. I have some cerrosafe ordered.

Re: Model Seven Unknown caliber [Re: Smilner01] #15965271 04/02/21
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Smilner01 Offline OP
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Changed my mind and took it to a smith today. Figure at least it looks better to the seller if a smith casts the chamber vs me doing it (he has offered to at minimum pay for chamber casting to determine caliber). Should have the rest of the story by mid week next week.

Re: Model Seven Unknown caliber [Re: Smilner01] #15965610 04/02/21
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kandpand Online Content
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270 WSM?


"Mother To Son"
by Langston Hughes

“Go afield with a good attitude, with respect for the forest and fields in which you walk. Immerse yourself in the outdoor experience. It will cleanse your soul and make you a better person”
-Fred Bear
Re: Model Seven Unknown caliber [Re: Smilner01] #15974147 04/08/21
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270 SAUM ?


I may not be smart but I can lift heavy objects

I have a shotgun so I have no need for a 30-06.....
Re: Model Seven Unknown caliber [Re: Smilner01] #15978722 04/09/21
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Smilner01 Offline OP
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Got it back from the smith today and it is a 7mmSAUM. He scoped the barrel and said the rifling and chamber all look great and it appeared to have been shot very little.

IC-B

Re: Model Seven Unknown caliber [Re: Smilner01] #15978947 04/09/21
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Going to keep it as is?

Re: Model Seven Unknown caliber [Re: mauserand9mm] #15979223 04/09/21
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Smilner01 Offline OP
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Originally Posted by mauserand9mm
Going to keep it as is?


Yes, the barrel seems to have good life left so I will keep it as is. I also just purchased a 700 in 300SAUM (with the factory stamping)

Re: Model Seven Unknown caliber [Re: Smilner01] #15983384 04/11/21
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Now for the hard part 7mm SAUM ammo or brass.


" Cheapest velocity in the world comes from a long barrel and I sure do like them. MB "
Re: Model Seven Unknown caliber [Re: Smilner01] #15983814 04/11/21
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Did he stamp it for you or is is still an "unknown" for the future?


Some spelling errors can be corrected by a vowel movement.
~ MOLON LABE ~
Re: Model Seven Unknown caliber [Re: LouisB] #15983862 04/11/21
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Smilner01 Offline OP
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Originally Posted by LouisB
Did he stamp it for you or is is still an "unknown" for the future?


A little strange on that one...This smith did not have the equipment to stamp the barrel. He has a smaller shop but it seemed odd that he had the means to cast a chamber (and he gave me the casting) but not to stamp a barrel. I will just order a stamp set and do it. Been needing an excuse to get a set anyway. I got my cerrosafe in yesterday so if that need ever arises again I will have some on hand.

Last edited by Smilner01; 04/11/21.
Re: Model Seven Unknown caliber [Re: Magnum_Bob] #15983876 04/11/21
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Smilner01 Offline OP
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Originally Posted by Magnum_Bob
Now for the hard part 7mm SAUM ammo or brass.


For sure, 7mm is definitely harder to find vs 300 (and that’s not just everywhere especially now)

Re: Model Seven Unknown caliber [Re: Smilner01] #15985570 04/11/21
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Originally Posted by Smilner01
Originally Posted by LouisB
Did he stamp it for you or is is still an "unknown" for the future?


A little strange on that one...This smith did not have the equipment to stamp the barrel. He has a smaller shop but it seemed odd that he had the means to cast a chamber (and he gave me the casting) but not to stamp a barrel. I will just order a stamp set and do it. Been needing an excuse to get a set anyway. I got my cerrosafe in yesterday so if that need ever arises again I will have some on hand.


Making a chamber cast is not rocket science.

Re: Model Seven Unknown caliber [Re: Craigster] #15986601 04/12/21
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Smilner01 Offline OP
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Originally Posted by Craigster
Originally Posted by Smilner01
Originally Posted by LouisB
Did he stamp it for you or is is still an "unknown" for the future?


A little strange on that one...This smith did not have the equipment to stamp the barrel. He has a smaller shop but it seemed odd that he had the means to cast a chamber (and he gave me the casting) but not to stamp a barrel. I will just order a stamp set and do it. Been needing an excuse to get a set anyway. I got my cerrosafe in yesterday so if that need ever arises again I will have some on hand.


Making a chamber cast is not rocket science.


Would not think stamping a barrel is either

Re: Model Seven Unknown caliber [Re: Smilner01] #16007766 Yesterday at 01:07 AM
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Adamjp Online Content
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IIRC ADG are doing 7mm SAUM brass.
Not saying it's available, but at least it is listed.
https://www.creedmoorsports.com/product/adg-7mm-saum-brass/ADG-Brass

Re: Model Seven Unknown caliber [Re: Smilner01] #16008764 Yesterday at 09:54 AM
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dogcatcher223 Offline
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How hard it it to hit a stamp with a hammer?


From a place you will not see, comes a sound you will not hear.
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