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Need info on Great Grandfather’s Mauser

What is a “chamber cast”? And is that something a gunsmith does? I thought it was just how the file was made, so not sure why it’s written in that paper
Correct. It's plugged and a molten metal is poured into the chamber. Cerrosafe is a brand. After it's hard they'll measure/mic the slug to determine it's exact size.
 
If you try shooting the wrong ammunition, the rifle can explode. The chamber cast verifies the proper ammunition for the rifle tested.
Many sporter conversions had the caliber of original rifle changed. This was a prudent step. However I don’t see your rifles serial number on the report. We are “assuming”.
 
So what’s the point of doing this to a rifle like this?
Um not trying to be a d*ck but I don't understand what part of "After it's hard they'll measure/mic the slug to determine it's exact size."

That's how you determine exactly what caliber bullet this gun is chambered for. No question. It's a matter of safety for some people who acquire a firearm.
 
if that rifle was a newly made sporter in 8mm mauser the top of the barrel or the side would be stamped " 8x57 JS "

this being a sporterized military k98k they may have just assumed if the caliber wasnt changed the barrel would have NO re-designation
 
Um not trying to be a d*ck but I don't understand what part of "After it's hard they'll measure/mic the slug to determine it's exact size."

That's how you determine exactly what caliber bullet this gun is chambered for. No question. It's a matter of safety for some people who acquire a firearm.
Right, I understand… Just not sure why they would need to check a rifle (which at this point had been in his possession for 30+ years) for its caliber, especially considering there was only one caliber of k98 rifles. No chance he was shooting this thing in the 90s
 
That’s NOT my great grandfather. That is (presumably) wartime photo of a German soldier with a rifle similar to mine. I posted it because I was unsure if mine was a wartime mod, or a post war mod.
I'd not like to speak for Otto but I believed the LARPING comment to be humorous.
 
Right, I understand… Just not sure why they would need to check a rifle (which at this point had been in his possession for 30+ years) for its caliber, especially considering there was only one caliber of k98 rifles. No chance he was shooting this thing in the 90s
Well I can't speak to the 'why' other than it's a safety thing, much like checking with GO/NOGO gauges as was also noted. That part about only 1 caliber is incorrect as this platform can and does easily run other calibers. That said USUALLY they'd be marked as they should be by rule. Israeli in 7.62 NATO and Norwegian in .30-06 are 2 in particular.
 
The LARPING part was funny. It's one of the reasons I blame on 'cool guy' shite being so expensive. Do you think that's post war also?
That’s NOT my great grandfather. That is (presumably) wartime photo of a German soldier with a rifle similar to mine. I posted it because I was unsure if mine was a wartime mod, or a post war mod.
You are 100% right. Two different guns. Would have been hilarious though. I was like there’s no way this man put on a uniform for a picture in a nation he just helped defeat and occupy.
 
You are 100% right. Two different guns. Would have been hilarious though. I was like there’s no way this man put on a uniform for a picture in a nation he just helped defeat and occupy.
That might have been trouble. Not like a reenactor stateside decades later.
 
I found it on a FB page dedicated to original ww2 color photos. People in the comments seem to agree they are Cavalry boots. Either way, it looks similar to my rifle. Here’s an ad I found, could be post war.
as to the ad, I believe the clue is the word ‘original’ Mauser, indicating that it is postwar.
 
My suspicion for the gunsmith inspection in the 1990s would be that the original owner of the gun, your great grandfather, either passed or was no longer able to remember or convey the caliber information. Whoever took ownership of the rifle prudently took it to a gunsmith to determine caliber and weapon safety. Otherwise I agree with you why get it cast 30 years after he took ownership of it assuming he knew and trusted what it was originally.

Agree with the others this appears to be a nice post war sporter conversion of a wartime Mauser.
 
My suspicion for the gunsmith inspection in the 1990s would be that the original owner of the gun, your great grandfather, either passed or was no longer able to remember or convey the caliber information. Whoever took ownership of the rifle prudently took it to a gunsmith to determine caliber and weapon safety. Otherwise I agree with you why get it cast 30 years after he took ownership of it assuming he knew and trusted what it was originally.

Agree with the others this appears to be a nice post war sporter conversion of a wartime Mauser.
Thank you.
he passed in 2016 (aged 100 actually). He owned the rifle since he acquired it some time after WW2 until his death. Interestingly, the box of “Norma” rounds was kept with the rifle, and when I received it a few years ago, half the box of 20 rounds had been fired, so he had shot it since 1990 when he bought them.
 
Then it is a little strange why he would get it inspected and chamber cast in the 1990s unless he brought it back and never tried to fire it until then. So much for my theory
 

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