Quite a lot of material can be ground off; a friend of mine, who's been a full-time rifle builder for over 30 years, has ground several Large-ring-small-thread Turk actions to small-ring dimensions for custom projects, and that's a lot of grinding. Most large-ring-large-thread actions take no more than .020" to clean and square. I haven't been asked to grind one in a long time but still have the capability.
John Farner
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Posts: 2949 | Location: Corrales, NM, USA | Registered: 07 February 2001
Tell us what your goal is; making the ring smaller, cleaning up pitting, removing markings, just making it true; what? Anyway, yes, John said, Mausers are very forgiving and can take a lot of metal removal and still be fine.
Posts: 17504 | Location: USA | Registered: 02 August 2009
The goal is to remove pitting and of course make the ring somewhat capable of tightly fitting a scope mount.
This is an FN Peruvian that has somewhat of a unique rear bridge so I don't want anything done to that, except to figure out how I can get a scope mount on there without changing the bridge.
An FN action was modified by CP Donnelly to the extent that there was no shoulder at the rear/bottom of the ring, tapered upward to where the space for the front scope base was left original. I'm not sure what that comes out to in terms of metal removed. It was chambered for a 257 Ackley and there was no problem that I'm aware of.
Posts: 1421 | Location: WA St, USA | Registered: 28 August 2016
That FN effectively gives you a 1.3 inch, small ring, large thread Mauser; not something I would do for any 55K psi cartridge. Your Peruvian sounds like a straightforward thing.
Posts: 17504 | Location: USA | Registered: 02 August 2009
A licensed gunsmith can re-cut/re-stamp/reposition the original serial number without ATF approval if it becomes illegible or obliterated. This is true even if the obliteration occurs in the process of gunsmithing or making a repair. There is no problem as long as it goes out with the same serial number it came in with and the marking adheres to ATF serial number marking specifications.
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Posts: 10900 | Location: North of the Columbia | Registered: 28 April 2008
Originally posted by Grenadier: A licensed gunsmith can re-cut/re-stamp/reposition the original serial number without ATF approval if it becomes illegible or obliterated. This is true even if the obliteration occurs in the process of gunsmithing or making a repair. There is no problem as long as it goes out with the same serial number it came in with and the marking adheres to ATF serial number marking specifications.
I do not doubt this happens, but I have been specifically told by the ATF (yeah, I know...) that this is not correct.
Must apply for a variance and have the work done by an 07 FFL.
When the large ring small thread Turk is ground to small ring is rehardening required?
Posts: 8352 | Location: Jennings Louisiana, Arkansas by way of Alabama by way of South Carloina by way of County Antrim Irland by way of Lanarkshire Scotland. | Registered: 02 November 2001
Posts: 8352 | Location: Jennings Louisiana, Arkansas by way of Alabama by way of South Carloina by way of County Antrim Irland by way of Lanarkshire Scotland. | Registered: 02 November 2001
