Commencing My First Custom rifle project

[Hoss Delgado]

With work pressure significantly reduced now ,l have been fortunate enough this year to finally start updating my Battery with a new PG rifle ( a .350 Rigby Magnum on a ZKK602 action ) and a new shotgun ( a BRNO full choke Over under ) . Now , l am commencing on my first custom rifle project .
I am planning on building a 10.75 × 68 MM ( .423 Mauser ) rifle on a BRNO ZKK 600 action . I ordered a special order 10.75 × 68 mm Barrel from Safari Outdoor which will reach me in 6 months . Now , l am not going after dangerous game with this gun . Enough experienced members on this forum already advised me against it. I am going to use it here in Texas for boars and stuff.

I have vintage cases for the .423 Mauser in my house and l plan to use these cutting edge monolithic meplat solids in the gun. The website mentions that the bullets are designed for the .404 Jeffery but l was hoping that it would work in the 10.75 × 68 MM .
I do have some reservations about this project though. Namely , How difficult is it going to be to convert a ZKK600 action to use this caliber ? And also will the pictured bullets work for my .423 Mauser ?
Please let me know your thoughts about any challenges l can face .
Hoss Delgado

 

[Hoss Delgado]

Update : So l contacted Cutting edge bullets to ask about whether their 350 and 400 grain monolithic meplat solids ( which they advertise as being meant for .404 Jeffery rifles ) would safely fire in a 10.75 × 68 mm rifle . This was their answer. Now , I'm worried. They don't seem too sure , themselves

 

[Hogpatrol]

Just curious, what contour barrel are you using.

 

[Inline6]

Math works I'm not sure what you would expect them to say?

 

[Hoss Delgado]

Just curious, what contour barrel are you using.

Bluing . Classic

 

[Hoss Delgado]

Math works I'm not sure what you would expect them to say?

This is my first time hand loading . So l am a bit nervous. I have always bought Factory ammunition for the last 20 years of my hunting career.

 

[Wyatt Smith]

I suggest you get a good reloading manual and read all of it. I am friends with a self taught reloader and his work is very questionable. It’s also very helpful to watch a good handloader load some.

 

[Inline6]

This is my first time hand loading . So l am a bit nervous. I have always bought Factory ammunition for the last 20 years of my hunting career.

It's not difficult to hand load. You just have to learn. Like anything else it depends how crazy you want to get with it. I have more money in a scale than most have in a hunting rig.

I admit I have a problem and have a tendency to buy the good stuff.

 

[Hoss Delgado]

How much work needs to be done to a ZKK600 action to get it to shoot 10.75 × 68 mm ? Reproofs , feed ramp alterations ?

 

[Hogpatrol]

Check Buffalo Arms. They carry a lot of the obsolete cartridge dies.

https://www.buffaloarms.com/10-75x68-mauser-ch4d-die-set-4d10-75x68mause

 

[Hoss Delgado]

Check Buffalo Arms for dies. They carry a lot of the obsolete cartridge dies.

https://www.buffaloarms.com/10-75x68-mauser-ch4d-die-set-4d10-75x68mause

Thanks man . This is really helpful

 

[Hoss Delgado]

Update : One of my friends also got me a Lee Enfield Action . Can you build a 10.75 × 68 mm rifle on a Lee Enfield action ?

 

[nztimb]

Update : One of my friends also got me a Lee Enfield Action . Can you build a 10.75 × 68 mm rifle on a Lee Enfield action ?

Not the best action for this cartridge as it is a rimless case where the Lee Enfield bolt is for rimless so a lot of work to get it to work right. I built the early 1901 Magazine Lee Enfield for a sightly shortened 405 Win case and made the magazine single stack to get every thing working perfectly

 

[Hoss Delgado]

Not the best action for this cartridge as it is a rimless case where the Lee Enfield bolt is for rimless so a lot of work to get it to work right. I built the early 1901 Magazine Lee Enfield for a sightly shortened 405 Win case and made the magazine single stack to get every thing working perfectly

In a single stack , l could still get in 4 rounds or something ?
I guess l can stick to a BRNO ZKK 600 , if the Lee Enfield action is inappropriate
Also , some of the veteran members here advised me against using monolithic solids of 400 grain or even 347 grain , as the 10.75 × 68mm Barrels don't have the adequate twist for them . And also l would encounter case capacity issues.
So l will stick to original pattern .423 caliber 347 Woodleigh FMJ Round nose solids

 

[Wyatt Smith]

A P14 Enfield would be very good for that too bad it’s Lee Enfield

 

[Hoss Delgado]

A P14 Enfield would be very good for that too bad it’s Lee Enfield

I also have a beautiful BRNO ZKK 600 action