A Spanish Mauser to rimmed 30-30 conversion question...

[1isenough]

New to this website, in hopes of getting some experience & opinion on a project I am working on. I have done around 20 barrel liners - mostly single shots, a levergun and a pump. I have a shot-out Spanish Mauser that I want to convert to 30-30 by lining the barrel, which is my first bolt action project. I made alterations to the extractor and bolt face rim, and the action cycles acceptably including magazine feed up to four rounds. My question is: In order to use the original recessed bolt face and extractor configuration, when chambered and headspaced the cartridge will not fully enter the chamber to the rim. This will leave about .116" of the cartridge base exposed. Since this is about the thickness of a large rifle primer, I believe this means the entire exposed portion of the cartridge will be comprised of the web portion of the cartridge, which should handle the pressure. As such, when I cut the chamber I will be headspacing off of the cartridge shoulder, not the rim. Seems like it should work.

Am I thinking correctly (other than starting a economically silly project like this). Safety issues I may not be considering? Your thoughts and experience are appreciated.

 

[Dusty Stevens]

The base is still solid there. Not saying its not dangerous, but pretty much every bolt action has that much or more exposed but its inside a bolt face on those. I think id go with another chambering not rimmed

 

[jackieschmidt]

Here is a WW 30 30 case head. It is pretty robust there.

as you can see, with .116 sticking out, you have more than enough web encased by the chamber Walls.

 

[Ggmac]

Its easier to just rebarrel but i knowthat not your choice. You could cut the rim to 473 on the 30/30 case . That way you can use the mag and all . Different 3030 case have a large amount of different in the web . Ive been doing this on mauser for 40 plus years . Some of the spanish mausers have a liner in them , mostly the 308 conversions.cetme trainers . I may have a barrel here . If you keep the rim and use that as your headspace, youll nee a extractor cut which is about 110 deep if you headspace on the shoulder, youll be sticking the case out more but no timed extractor cut . Cut the brass once to 473 . Gotta go

 

[Ggmac]

New to this website, in hopes of getting some experience & opinion on a project I am working on. I have done around 20 barrel liners - mostly single shots, a levergun and a pump. I have a shot-out Spanish Mauser that I want to convert to 30-30 by lining the barrel, which is my first bolt action project. I made alterations to the extractor and bolt face rim, and the action cycles acceptably including magazine feed up to four rounds. My question is: In order to use the original recessed bolt face and extractor configuration, when chambered and headspaced the cartridge will not fully enter the chamber to the rim. This will leave about .116" of the cartridge base exposed. Since this is about the thickness of a large rifle primer, I believe this means the entire exposed portion of the cartridge will be comprised of the web portion of the cartridge, which should handle the pressure. As such, when I cut the chamber I will be headspacing off of the cartridge shoulder, not the rim. Seems like it should work.

Am I thinking correctly (other than starting a economically silly project like this). Safety issues I may not be considering? Your thoughts and experience are appreciated.

Mausers dont have a recessed bolt face .

 

[tobnpr]

^^^
I was trying to figure that out myself...