Author Topic: 7mm Mauser  (Read 575 times)

Offline Whitehorse Lane

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7mm Mauser
« on: July 30, 2021, 08:21:24 AM »
As my search for a proper Krag Carbine goes on, I purchased a 7MM Mauser to play with. I can envision several "Persona" to pair with it for GAF. I have searched the net, including here, including the "TRAILBOSS" thread looking for load data.
The consensus seems to be 10 grains of TB under 168 cast bullet would be a good safe starting point?

Also, looking at a Remington rolling block, would that be safe as well?
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Offline Tascosa Joe

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Re: 7mm Mauser
« Reply #1 on: July 30, 2021, 09:25:01 AM »
Are you looking for a 7mm RB?
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Offline Major 2

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Re: 7mm Mauser
« Reply #2 on: July 30, 2021, 10:50:46 AM »
For me Trail Boss opened a whole new enjoyment level with Milsurps   :)

I had a Spanish 1916 Mauser that had been re-barreled in .308 that I use 11 Grains of TB and 165 grain bullet
I sold it and kinda have mix feeling about that  ::) 

But I continue with 30/40 Krag, 30'06 and 303 British and also 8mm Label.

You are on the right road with your load , have chronograph it yet ?

Staying under 1400 FPS and GC are optional. Also you might try Hi-Tech coated bullets.
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Offline Niederlander

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Re: 7mm Mauser
« Reply #3 on: July 30, 2021, 12:10:03 PM »
According to the ballistician I talked to, the Trail Boss load is as follows.  Figure out where the base of the bullet will be in the case.  Fill the case with Trail Boss to that line.  Weigh the charge in the case.  That's the load.  Compressing it won't hurt you,  but it certainly doesn't help anything, either.  Of course you can chronograph the load, but I really doubt you'll have anything to worry about in that regard.  I'd recommend a gas check bullet.  It's probably just me, but I've never had much luck with plain base bullets in anything .30 and below.
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Offline Trailrider

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Re: 7mm Mauser
« Reply #4 on: July 30, 2021, 12:52:47 PM »
One thing to keep in mind about foreign-made 7x57 guns: The headspace dimensions are longer than U.S. When resizing U.S.-made brass, back off your sizing die until the brass will chamber with just a little "feel". If resized to U.S. specs, and fired again in the longer chambers, brass life will be reduced significantly, and you might even get head separations! Don't know how the brass will initially expand with light loads of Trailboss. Just saying...
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Re: 7mm Mauser
« Reply #5 on: Today at 06:03:42 PM »

Offline Whitehorse Lane

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Re: 7mm Mauser
« Reply #5 on: August 03, 2021, 04:12:28 PM »
.
Are you looking for a 7mm RB?
I might be, ...
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Offline Whitehorse Lane

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Re: 7mm Mauser
« Reply #6 on: August 03, 2021, 04:24:44 PM »
According to the ballistician I talked to, the Trail Boss load is as follows.  Figure out where the base of the bullet will be in the case.  Fill the case with Trail Boss to that line.  Weigh the charge in the case.  That's the load.  Compressing it won't hurt you,  but it certainly doesn't help anything, either.  Of course you can chronograph the load, but I really doubt you'll have anything to worry about in that regard.  I'd recommend a gas check bullet.  It's probably just me, but I've never had much luck with plain base bullets in anything .30 and below.

I have some 168 grain cast lead hollow points with gas checks. Seated for an overall length of 3.001" it came out to 16 grains of TB.
Is that a max load? I have no way to chronograph. The rifle has a 29" barrel, it is an 08 Mauser so it should be the 3 lug version I think, so pretty strong.

But I'm kinda looking for plinking type rounds as opposed to killing buffalo at half a mile. I know it can be done I saw Costner kill a charging bull at that distance with a Henry in Dances with wolves so...  ;D
And I don't want to poke holes in the Range's steel targets either




White Horse Lane
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Offline Whitehorse Lane

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Re: 7mm Mauser
« Reply #7 on: August 03, 2021, 04:30:25 PM »
For me Trail Boss opened a whole new enjoyment level with Milsurps   :)

I had a Spanish 1916 Mauser that had been re-barreled in .308 that I use 11 Grains of TB and 165 grain bullet
I sold it and kinda have mix feeling about that  ::) 

But I continue with 30/40 Krag, 30'06 and 303 British and also 8mm Label.

You are on the right road with your load , have chronograph it yet ?

Staying under 1400 FPS and GC are optional. Also you might try Hi-Tech coated bullets.

I ALWAYS have mixed feelings when a gun leaves, even when I hate the darn thing lol. Sold a Mini 14 decades ago I could never get to shoot even to my low standards.. Felt bad afterwards. Sold an AK during the Clinton ban, I liked the gun, but made of a grand on it.. Even with that I had regrets..

I do not have access to a chronograph alas.

Your 11 grain .308 load seems like a starting point
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Offline Niederlander

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Re: 7mm Mauser
« Reply #8 on: August 03, 2021, 05:47:23 PM »
I don't think you'll have to worry about a buffalo killing round with Trail Boss.  I shoot Trail Boss loads in a Krag carbine, and I'm not sure there IS any recoil.  It makes a '94 saddle ring carbine a fun shooter, too.
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Offline Robert Swartz

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Re: 7mm Mauser
« Reply #9 on: August 04, 2021, 10:58:43 AM »
I ALWAYS have mixed feelings when a gun leaves, even when I hate the darn thing lol. Sold a Mini 14 decades ago I could never get to shoot even to my low standards.. Felt bad afterwards. Sold an AK during the Clinton ban, I liked the gun, but made of a grand on it.. Even with that I had regrets..

I do not have access to a chronograph alas.

Your 11 grain .308 load seems like a starting point


.....you have everything but the gun. I now have everything for my Krag but the brass, lol....
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Re: 7mm Mauser
« Reply #10 on: Today at 06:03:42 PM »

Offline Whitehorse Lane

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Re: 7mm Mauser
« Reply #10 on: August 04, 2021, 11:58:26 AM »

.....you have everything but the gun. I now have everything for my Krag but the brass, lol....

tracking updates showed it in Indianapolis this morning, then Cincinnati this afternoon?

Going to Dillsboro IN I guess that makes Post Office sense... not sure I get the logic but I'm not a government employee lol
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Offline cpt dan blodgett

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Re: 7mm Mauser
« Reply #11 on: August 07, 2021, 11:15:50 AM »
I have been using 11 grains of A2 under 210 grainers in my Krag and 03.  Had planned on trying that in my 7 MM 93 and 95 mausers as well.
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