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Shooting & Reloading - Mausers, Big Bores and others >> Big Bore Rifles
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buckstix
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Reged: 07/11/12
Posts: 1463
Loc: Whitetail Country
Brevex #20 joins the Collection - Custom 350 Mashburn Super
      #395691 - 10/01/26 12:00 PM

Brevex #20 joins the Collection - Custom 350 Mashburn Super Magnum

Well, this makes 2 Brevex Mausers added to the Collection in just one week. Nothing for nearly a year, and now 2 Brevex rifles. Number 19 is a 375 H&H and this one is 350 Mashburn Super Magnum, which is a 60s wildcat of a 375 H&H reduced to 35 caliber, with a slightly expanded shoulder. However, there is an interesting story about this rifle. .... I actually bought this rifle about 2 months ago on the GunBroker site as a "buy-it-now" sale. It was listed as ... https://www.gunbroker.com/Item/1135307846

Brevex Magnum Action in 350 Mashburn
Custom Rifle
Brevex Magnum Action
Caliber: 350 Mashburn
26½ in Holaugh Barrel
Timmy Trigger
Bore: New
Action is worth the price alone.
$2500

I immediately clicked the button and received a confirmation of my purchase from GunBroker. Unfortunately for me, the seller renigged on the sale, and later sold it outside the listing. Reporting the seller to GunBroker did no good for me, but I think they still charged him the 5% commission for the sale. Then, about 2 months later, I was contacted by a fellow Gun Collector asking if I was still looking for a Brevex rifle. He said the caliber was 350 Mashburn Super Magnum. Small World. ... The seller made a reasonable profit, which I was happy to pay.

Here are the specs:

Brevex Custom - SN 106
Breves Action - Stamped "M300 No.106"
Barrel Length - 26-1/2"
Length of Pull - 13-3/4" over Red Silvers Style Recoil Pad
Weight - 10 lbs 6 oz (with scope)
Trigger - Timney Gold Adjustable
Safety - Buehler-Style Low Profile
Sights - NECG Island 1 standing 2 folding rear - NECG barrel-band front sight
Sights - Nikon 1x20 Buckmaster w/ multi-plex reticle w/ Warren Lever Rings
Stock - Light Walnut
Features - rear sling eye - barrel-band front eye

http://www.buckstix.com/buckpics/mashburn-000.jpg



http://www.buckstix.com/buckpics/brevex20.jpg



--------------------
"You never pay too much for something, you only buy it too early."

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m239
.300 member


Reged: 13/09/17
Posts: 203
Loc: Australia
Re: Brevex #20 joins the Collection - Custom 350 Mashburn Super [Re: buckstix]
      #395692 - 10/01/26 12:24 PM

Interesting chambering.

Great start to the year.

--------------------

Adventure is worthwhile
~ Aesop


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93x64mm
.416 member


Reged: 07/12/11
Posts: 4698
Loc: Nth QLD Australia
Re: Brevex #20 joins the Collection - Custom 350 Mashburn Super [Re: m239]
      #395697 - 10/01/26 04:33 PM

I was a year out!
Sorry Buckstix for giving you false hope
Looks a lovely piece of kit, now for the range reports if you're not snowed in!

Edited by 93x64mm (11/01/26 06:04 AM)

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lancaster
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Reged: 06/05/08
Posts: 9882
Loc: There's a lighthouse in the mi...
Re: Brevex #20 joins the Collection - Custom 350 Mashburn Super [Re: 93x64mm]
      #395698 - 10/01/26 08:14 PM

just remember, you can't have all brevex action mauseres in the world.

whats now with reloading dies? I hope it came with the rifle or you have anything similar enough.

--------------------
Norwegian hunter misses moose, shoots man on toilet
.
bringing civilisation to the barbarians

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buckstix
.400 member


Reged: 07/11/12
Posts: 1463
Loc: Whitetail Country
Re: Brevex #20 joins the Collection - Custom 350 Mashburn Super [Re: lancaster]
      #395699 - 10/01/26 10:24 PM

Quote:

just remember, you can't have all brevex action mauseres in the world.

whats now with reloading dies? I hope it came with the rifle or you have anything similar enough.

I have over 400 sets of reloading dies. I don't have the exact 350 Mashburn Super Magnum dies, but I have a set of 350 Apex Magnum dies, and a set of 35 Ackley Magnum dies, so I can mix and match to reload.

--------------------
"You never pay too much for something, you only buy it too early."

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DarylS
.700 member


Reged: 10/08/05
Posts: 28170
Loc: Beautiful British Columbia, Ca...
Re: Brevex #20 joins the Collection - Custom 350 Mashburn Super [Re: buckstix]
      #395703 - 11/01/26 03:37 AM

Ahh, the Super Mag uses the full length H&H case. Easy peasy.

--------------------
Daryl


"a gun without hammers is like a Spaniel without ears" King George V

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buckstix
.400 member


Reged: 07/11/12
Posts: 1463
Loc: Whitetail Country
Re: Brevex #20 joins the Collection - Custom 350 Mashburn Super [Re: DarylS]
      #395764 - 13/01/26 03:06 AM

UPDATE .... RANGE REPORT .... I bought some Commercial Custom Loaded ammo w/ 200g bullets and went to the range. I was very disappointed as to how conservative the load was. Velocity was about the same as 35 Remington, and much less than 350 Rem Mag. I am sure my hand-loads will do much better. Powder in the Custom ammo was 71.4 grains and appeared to be IMR4350. PO Ackley published max load for IMR4350 powder is 89 grains with a 250g bullet, and likely much more for a 200g bullet.

And ... the real surprise came when I looked at a fired case. The rifle was not marked as to caliber, and was advertised as a 350 Mashburn Super Mag. Turns out the rifle's caliber is actually .. 350 Mashburn Super Mad "Improved". Future handloads should make this a real 35 caliber screamer.

http://www.buckstix.com/buckpics/350MASH-TARG-1.jpg



--------------------
"You never pay too much for something, you only buy it too early."

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lancaster
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Reged: 06/05/08
Posts: 9882
Loc: There's a lighthouse in the mi...
Re: Brevex #20 joins the Collection - Custom 350 Mashburn Super [Re: buckstix]
      #395765 - 13/01/26 03:13 AM

"I was very disappointed as to how conservative the load was."

the real magnum guy don't ask for a good target, only thing he needs is a hard kicking rifle.

--------------------
Norwegian hunter misses moose, shoots man on toilet
.
bringing civilisation to the barbarians

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93x64mm
.416 member


Reged: 07/12/11
Posts: 4698
Loc: Nth QLD Australia
Re: Brevex #20 joins the Collection - Custom 350 Mashburn Super [Re: lancaster]
      #395777 - 13/01/26 07:17 AM

Oh boy!
If that's not a challenge from Lancaster then nothing is
The 358 Norma gets a 250gn pill going at 2750fps, a bit more boiler room in this 350MSMI - so will it hit 2900fps?
Who knows

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buckstix
.400 member


Reged: 07/11/12
Posts: 1463
Loc: Whitetail Country
Re: Brevex #20 joins the Collection - Custom 350 Mashburn Super [Re: 93x64mm]
      #395780 - 13/01/26 09:00 AM

The PO Ackley load is ... 250g bullet IMR-4350 89.0g 3,076 fps

one should get 3200 fps with a 200g bullet

--------------------
"You never pay too much for something, you only buy it too early."

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