To build a rifle around the 80 grain eld-m: 98 Mauser in 22-6mm

1000yards

FNG
Joined
Mar 16, 2025
Messages
14
Summary:
I have a plan, possibly just a terrible idea, but I’m looking for advice and criticism either way. In my possession is a 1934 Oberndorf ‘postal service’ Mauser 98 action in good condition and unmodified. I plan to use this action to build a rifle that shoots the .224 80 grain eld-m to be used on deer and hogs out to 400 yards. I believe the 22-6mm (aka 224 TTH, aka 224 Clark) will be the best cartridge for this purpose. Keeping chamber pressures rational, I should be getting between 3100-3300 fps depending on barrel length.

The Action:
The action is the only non-variable. If everyone tells me it's a bad idea then I scrap the project. I understand there’s far better actions than an old 98. But I like Mausers, and my gunsmith has a great record of building very accurate rifles with them. Also this action is already paid for. Some people think it's unwise to push a pre-war 98 to modern pressure limits, others will point out the untold millions of rounds of .270 win fired without any issues. My plan is to keep it simple and strike a balance: the luxury of using a 6mm case means I won't need to push the pressure to attain my velocity goal.

The Cartridge:
I like that the 22-6mm has lineage to the 7x57 and the cartridge length seems to match well with the magazine length. The only downside is I'll have to make my own brass from 6mm Remington, and options for that are limited. For that reason alone I would consider other cartridges. 22 creedmoor, 220 Swift, and 22-250 are all contenders. But still the 22-6mm beats them all in case capacity and the cartridge length minimizes potential feeding issues. What do ya'll think?

The Scope:
A Trijicon Credo 2.5-15x42, or something similar and nothing over 44mm objective size.

Bases:
I’m not set on bases but I want the picatinny system. Options include but not limited to a 2-piece set from Warne or Talley, or 1-piece rail from EGW or Ken Farrell.

The Stock:
I’m not set on any specific stock yet but I would prefer non-wood. I have an Interarms 375H&H that sits in a Bell and Carlson and that works great. Other options are Boyds, Richards, Hogue, and Bansner. I’ll be shooting from all sorts of positions: treestand, prone, quad sticks, truck window. Are there any other companies I should consider?

The big questions:
What twist rate would you guys recommend? Most of my hunting is at sea-level and it can get pretty cold here.
What barrel length? I’ll be using a suppressor and I won’t be seeking any tight situations where maneuverability is important.
What am I missing -what else should I consider?
 
Can’t comment on the old action. Can’t comment on sentimentality of the 22-6mm either.

Practically speaking, why do anything other than the 22 creed? Everything is easily available. For 400 and in, the extra velocity is unnecessary from a bit bigger case capacity IMO.

My new 14” 22 Creedmoor is pushing Honady factory 80 eldx ammo to 2840 fps (before the barrel is broken in). The new 16” is pushing 2935.

I don’t think anything meaningful will come from an xtra 100 fps.

https://rokslide.com/forums/threads/22-creed-velocity-in-14-16-and-18-inch-ls-wild-barrels.409999/
 
Any German M98 action made before 1943 is an excellent action. Particularly the ones made between the wars.

I don’t have a comment on the chambering you mentioned, because I am not familiar with it. But I will say that I don’t think you can go wrong as long as it is something that uses the full length and chambers reliably. I have a beautiful .22-250 built on an FN 98 action that is horribly unreliable about feeding. It needs some work done because a previous owner had lost the floor plate and spring, so I had to get a new one. So, if your chambering is a bit short, you might have problems.


____________________
“Keep on keepin’ on…”
 
If that rifle is in original trim it would be a travesty to butcher it.

That said there is nothing wrong with building a custom rifle on a Mauser, and plenty right.

I don’t like your choice of cartridge because it is a crappy shape for reloading due to the taper and shoulder angle.
Also good brass and dies are not available.

The 22 Creedmoor addresses all of the above very well and will give you what you desire in a very easy to manage package.
 
I love the idea, but I'd personally consider a 22-6.5x55 lapua. There's still lapua brass available, and it'll be superior to any 6mm rem brass on the market, plus case dimensions are very similar between the two. The only caveat would be that the rim on the x55 is 0.007 larger, but it may fit fine without any modifications.

It's a lot on work for making a case that'll likely only be 75fps faster than a 22cm, but getting that shorter, sharper angled case to run smoothly from the M98 would be more of a challenge than the longer more tapered X55 or X57 parent cases.
 
I cannot comment on the action but I recently built a 22-6 Ackley Improved and it is a very impressive cartridge. Granted mine has a 26 in barrel but it pushes an 80 ELDM at 3600. The brass selection isn’t good but overall really cool round.


Sent from my iPhone using Tapatalk
 
I’ve done a few M98s. The last one in 308. The cartridge size works great when done correctly. Parkler Hale did it for a long time too. So I wouldn’t worry about that too much with a good ‘smith.

The M98 action is awesome, very strong. Just a bit heavy. I’d stay with something that has the same cartridge base size to make it a bit easier, other than that, any cartridge that can reliably fit (and feed) is doable.
 
I cannot comment on the action but I recently built a 22-6 Ackley Improved and it is a very impressive cartridge. Granted mine has a 26 in barrel but it pushes an 80 ELDM at 3600. The brass selection isn’t good but overall really cool round.


Sent from my iPhone using Tapatalk


Do you have any more data on it?
 
Built a 22-6mm on Remington 700 270 win donor as a target type just because gun. 1-8 twist 27.5inch barrel and a stiff load of h4841sc it runs right at 3600fps with 80gr A-max. If I were to build it again I might go a little faster twist like 1-7 for the new bullets. When I had mine done 80gr a-max and 77gr match king were the only heavy .224 bullets. I have never had an animal go more than a few steps. I say go for it!
 
Oberndorf made arguably the best 98s (notwithstanding the late WW2 years) and they should have...it was Paul Mauser's factory after all. I'm not familiar with the cartridge, but for me a classic action deserves to be mated with a classic caliber. But it's your action and you should do whatever you feel is best. What is a "postal service" mauser? Standard Modell?
 
Oberndorf made arguably the best 98s (notwithstanding the late WW2 years) and they should have...it was Paul Mauser's factory after all. I'm not familiar with the cartridge, but for me a classic action deserves to be mated with a classic caliber. But it's your action and you should do whatever you feel is best. What is a "postal service" mauser? Standard Modell?

I assume he means the Standard Model. Which should be quite a valuable collectors item if it is really unmodified and in good condition. But I assume the OP has already considered that.

I have found several 98 rifles with great actions for less than the action alone costs. I picked up another beautiful .22-250 the other day. I am sort of assuming that the barrel is shot out, but the price was so low that it’s within the range at which I will end up with a wonderful rifle once I have it rebarreled.


____________________
“Keep on keepin’ on…”
 
I assume he means the Standard Model. Which should be quite a valuable collectors item if it is really unmodified and in good condition. But I assume the OP has already considered that.

I have found several 98 rifles with great actions for less than the action alone costs. I picked up another beautiful .22-250 the other day. I am sort of assuming that the barrel is shot out, but the price was so low that it’s within the range at which I will end up with a wonderful rifle once I have it rebarreled.


____________________
“Keep on keepin’ on…”

Sounds like a great action for a 7x57...
 
Oberndorf made arguably the best 98s (notwithstanding the late WW2 years) and they should have...it was Paul Mauser's factory after all. I'm not familiar with the cartridge, but for me a classic action deserves to be mated with a classic caliber. But it's your action and you should do whatever you feel is best. What is a "postal service" mauser? Standard Modell?

On page 183 of Olson’s Mauser Bolt Rifles (3rd Edition), he describes a variation of the Mauser Standard Modell made for the Deutsche Reichspost marked DRP.


____________________
“Keep on keepin’ on…”
 
Back
Top