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Started By
Message
re: Rebuilt a K98, should be safe to fire?
Posted on 1/23/22 at 10:03 pm to Scoob
Posted on 1/23/22 at 10:03 pm to Scoob
quote:
my dumb arse shot one rd through it, and got a fireformed case
Lucky you didn't blow yourself up!
You'll need to get the chamber checked to see wtf it is. Whats the bolt face measure?
There aren't many standard 8mm calibers out there
1
Posted on 1/23/22 at 10:40 pm to DownshiftAndFloorIt
quote:Yeah, karma for my comment earlier I guess.
Lucky you didn't blow yourself up!
It shot fine and accurately, bolt was damn tight afterwards. When we opened it, that's what extracted
I'm digging more into this. You can definitely see the beginnings of a neck there, it isn't just a clean straight wall.
I received this 'gun' as a barrel, action, trigger, trigger guard. Bolt without safety, and an extractor that I replaced because it wasn't grabbing 8mm cases to extract when cycling dry.
(I bought and added the stock, mag follower, spring, baseplate. Also the safety wing, and a new extractor.)
I wonder if the "worn extractor" may have been fitted to load the new caliber, possibly as a single shot. It is a K98 action, not a Yugo shorter action... I think you have some room to 'drop in' a cartridge.
Guy on another site speculated about it being a Weatherby. The H&H speculation came out, because we measured the distance to the beginning of the neck, and it came out 2.412 or something (matching the H&H specs). Maybe 300 H&H?
What little I'm getting on the history of the gun, it didn't belong to a guy who travelled to Africa, but probably did hunt here in North America. What 8mm wildcat calibers arose, for maybe elk, bear and moose? And figure it's old, so eliminate a lot of recent stuff.
I didn't get the bolt face measured, but it appears identical to the (good) Mauser variant *VZ 24* that I have.
I'm kinda disappointed and curious at the same time. A confirmed ID of a known rd would be interesting, but I've basically restored it to 'correct' K98 appearance otherwise. My son likes milsurps and we were excited to get a 'true' K98.
Posted on 1/24/22 at 4:50 am to Scoob
I read many years ago that the most common conversion for the KAR 98 K bring back rifles was an 8mm/06. In other words, a 30/06 case necked up to an 8 mm bullet. That way they could keep the 8mm barrel and just ream out the chamber to be able to use common and available 30/06 brass. If you compare the case you got after firing to a 30/06 case I bet that is what you have. If so, it is strictly a handloading proposition but an easy one to do.
Posted on 1/24/22 at 6:16 am to jimbeaux82
quote:Funny, you're the second person to mention that caliber. The first was, of all places, from Amazon-
I read many years ago that the most common conversion for the KAR 98 K bring back rifles was an 8mm/06. In other words, a 30/06 case necked up to an 8 mm bullet. That way they could keep the 8mm barrel and just ream out the chamber to be able to use common and available 30/06 brass
I looked online at dummy rounds, and initially ordered a set of 375 H&H (not A-Zooms, but real inert rounds) from somebody. I cancelled and typed a sentence explaining why I ordered, and why I cancelled... bore diameter.
Dude responded back and said exactly what you did, and said he had some of those (in dummies) if I wanted to try.
I think I will.
Posted on 1/24/22 at 1:55 pm to Scoob
I am pretty sure we have solved your mystery.
Posted on 1/24/22 at 2:15 pm to jimbeaux82
Posted on 1/24/22 at 3:37 pm to cgrand
quote:
here is the brass case for 8mm/06
$2.35/piece of brass! Ouch! Another option would be to neck up 30-06 brass to 8mm. Could prob be done w/ 8mm-06 reloading dies. If not, a $20 8mm neck expanding die would do it. 8mm-06 dies are expensive ($200 on Midway) and may be hard to find (special order on Midway). I don't have my handloading books in front of me, but if the 30-06 and 8mm-06 dimensions are the same except for neck diameter, you could load ammo using an 8mm neck expanding die + 30-06 dies to see how the gun works before spending so much $$$ on special dies. That would work the neck of the brass extra, but maybe not too bad.
Posted on 1/24/22 at 4:32 pm to TigerOnThe Hill
quote:
$2.35/piece of brass! Ouch!
yeah this kinda sucks for the OP, especially since 8mm mauser is like 0.80/round
Posted on 1/24/22 at 6:02 pm to TigerOnThe Hill
Dimensions on the 8mm-06 and the .30-06. are the same just a larger diameter bullet.
Posted on 1/24/22 at 7:21 pm to bbvdd
quote:
Dimensions on the 8mm-06 and the .30-06. are the same just a larger diameter bullet.
well yes but that’s not the issue
finding 8mm/06 ammo is the issue...unless you handload or know someone who does the OPs rifle is a doorstop
Posted on 1/24/22 at 7:32 pm to cgrand
quote:
finding 8mm/06 ammo is the issue...unless you handload or know someone who does the OPs rifle is a doorstop
Yeah, that's for sure the bad news. OTOH, the good news is that if Scoob chooses to handload for it (assuming it's indeed a 8mm-06), it's an easy wildcat to load for. He even has various options for reloading dies.
Posted on 1/24/22 at 7:34 pm to Scoob
Scoob, I'm dying for you to buy the Cerrocast, make a cast of the chamber and put an end to this mystery! 
Posted on 1/24/22 at 7:40 pm to cgrand
quote:
OPs rifle is a doorstop
I got a door needs proppin
Posted on 1/24/22 at 8:22 pm to DownshiftAndFloorIt
Next step is looking at the 8mm-06 snap caps.
I ordered some from the Amazon guy, JDR Dummies. This was the guy I originally ordered the H&H dummies from, and who seems pretty doggone knowledgeable on this stuff (as much as this board, and Gunboards didn't come up with the 8m-06 idea yet on their Mauser forum).
Here's a couple of our messages back and forth:
I ordered some from the Amazon guy, JDR Dummies. This was the guy I originally ordered the H&H dummies from, and who seems pretty doggone knowledgeable on this stuff (as much as this board, and Gunboards didn't come up with the 8m-06 idea yet on their Mauser forum).
Here's a couple of our messages back and forth:
quote:
Jan 23, 2022 12:42 PM
I initially ordered this to check and see what a K98 Mauser has been rechambered to. The rifle is unmarked, and has been bored out. Based on initial caliper measurements from case length to first neck, I first suspected 375 H&H. However, the barrel diameter is still in the "thirty cal" size, not a 9mm size. At this point I'm leaning towards 8mm Remington Magnum. Similar length of chamber to neck, but still with the original diameter of bullet.
Thanks for your understanding and patience.
Jan 23, 2022 7:22 PM
Good evening,
Thank you for contacting us. It is highly likely that your rifle has been rechambered for 8mm-06 (a 30-06 necked out to 8mm). This was common "back in the day" to do since 8x57 was not readily available and if the chamber was worn, it was an easy remedy. There is also no change to the extractor or bolt face. Let me know if you would like us to send you a set of those.
V/R,
Mike
Jan 24, 2022 12:46 AM
Can you tell me the length of the 8mm-06 case dimensions? I was unfortunate/foolish enough to find out the hard way that this chamber was bored out... it fireformed the case nearly straight, almost the entire length of the case. You see the beginnings of a neck right at the tip. I sent a photo of the case, next to a surplus 8mm mauser rd.
No damage to me or the gun, thankfully.
Attachments:
download.jpg
Jan 24, 2022 6:26 AM
The 8mm-06 is dimensionally the same as a 30-06 except that the neck is enlarged to 8mm (.323). You can Google “30-06 dimensions” to get all the details. Definitely sounds like that’s what they did, especially since it fired at all.
V/R,
Mike
Jan 24, 2022 9:49 AM
Yeah, I think i will go ahead and order that instead.
Do you have the link to that?
Jan 24, 2022 7:44 PM
Hello,
Thank you for shopping with us. Amazon seller JDR Dummies could not accept your recent request for order cancellation due to the order already being shipped. If you have any other requests or concerns, contact the seller for more information.
Regards
JDR Dummies
Jan 24, 2022 7:45 PM
We are sending you a set of five of our 8mm-06 snap caps in place of the 375 H&H.
V/R,
Mike
Posted on 1/25/22 at 7:30 am to Scoob
Did you compare the fired case to an unfired 30/06 case yet? If the beginning of the shoulder on the fired case is at the same length as the shoulder on the 30/06 then it is some proof that you have an 8mm/06
Posted on 1/25/22 at 9:10 pm to jimbeaux82
quote:I looked, don't have one. Closest thing I have is a 270, which I don't have a rifle for... it's close.
Did you compare the fired case to an unfired 30/06 case yet? If the beginning of the shoulder on the fired case is at the same length as the shoulder on the 30/06 then it is some proof that you have an 8mm/06
Posted on 1/26/22 at 8:59 pm to Yewkindewit
quote:
chambered a round, held it of to the side under the shooting bench at the range and pulled the trigger. All went well. Whew!
Put it in a vice, tie string to trigger, stand behind a tree
Posted on 1/27/22 at 11:54 pm to jimbeaux82
quote:Ruh roh...
Did you compare the fired case to an unfired 30/06 case yet? If the beginning of the shoulder on the fired case is at the same length as the shoulder on the 30/06 then it is some proof that you have an 8mm/06
what the hell is this? Here's a 30.06 next to the 8mm, and the fireformed case:
Blurry, but you can tell plain as day- the neck is longer than a 30.06
Posted on 1/28/22 at 7:08 am to Scoob
Looks a good bit bigger around too.
Posted on 1/28/22 at 7:13 am to Scoob
If that shoulder is rounded and it is in those pics, though may not be with a longer case, you might have a Weatherby caliber.
All weatherby’s have rounded shoulders
All weatherby’s have rounded shoulders
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