Barrel dimensions of Siamese Mauser

[semtav]

Does anyone have the Bore and groove dimensions of their Siamese Mauser. I don't have a slug big enuf to measure the groove at the moment but I'm coming up with .315 for bore dia. Just curious what others have.

Thanks
Brian

[bouncer50]

I did mine over 30 years ago it seem like 314- 329 i could be wrong but as i said that was long ago. The only way to find out is slug yours out to make sure. Not two rifles will not all ways be the same.

[semtav]

Thanks bouncer. that kinda confirms my bore dia
anyways. Trying to find the right bullet to paperpatch and that was smaller than I had figured.

[JCherry]

According to my records my Siamese barrel is .314/.327. I've used the Lee 8mm Maximum which as cast was .328 diameter and the Lee 329-209-1R which cast a bit large as I recall and my notes indicate I used a .303 Brit sizeing die like a push through die to size the bullets to .330. I also had to "nose size" both bullets, as I recall, in a .314 sizer die.

Have Fun,

JCherry