Rechamber?

[Kennygee]

This is something am considering that I might have done on a 1909 Argentine Mauser carbine . If the barrel is in rough shape have it rebored to .35 Whelen. It is already chambered to .30/06. Will I need to have the chamber gone over or just checked with gauges or just a casting check? It is not in my possession just yet. I have another that was sporterized some time ago and shoots sub moa with .311 sierra bullets. Thanks for all the input

 

[Jim Watson]

I don't know what you mean by "have the chamber gone over."
The gunsmith will rebore .31-06 to .35 Whelen by boring, rifling, and reaming a new chamber NECK, leaving the chamber alone.
If the chamber is rusty, rough, or out of spec oversize or long on headspace, there is not much he can do with it.

 

[Kennygee]

Thanks Jim that was what I was hoping to hear. I did not want to have to pull the barrel cut threads and rechamber. If it is to bad then a new barrel is my only other option.

 

[Bart B.]

Those 1909's rechambered to 30-06 have problems with reloads. The 7.65 Argentine Mauser chamber in front on the case extractor groove is a few thousandths larger than 30-06 chambers. Incipient head separations happen full length sizing 30-06 cases.

 

[boom boom]

Rather than going the reboring and rechambering route, 1909 Argentines are a 98 Mauser variant. These are large ring and you can get decent hunting barrels that require modest finish reaming by your gunsmith to set the headspace or you can even tackle it yourself if you are moderately mechanically inclined.

Try Midway for a .35 Whelen short chambered barrel for $92 for a large ring Mauser. You'll have longer brass life and the new barrel should shoot a lot more accurately than a rebored and rechambered old one and cost less to boot.