Eddystone 1917 .30-06 to .300 h&h

yellowsevenpot

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Hey all Newb Here,

I was given an unstocked m1917 i would like to turn into a project. I am thinking about converting it from .30-06 to another .30 caliber rifle, using the current barrel. I have heard that .300 h&h is a common conversion, but i dont have a lathe to open up the bolt face. Not sure how I could do it by hand.

My only experience in smithing is accurizing revolvers... so i know i have a lot to learn and am a long way from the work.

I am hoping someone around has some experience rechambering m1917's who could give me some insight.





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Do you have a vertical mill? It is possible to open up the bolt face with a boring head.
 
I'd do some cking on that , the 300 Holland and Holland , produces some higher pressures then the 06. It may be fine using a new barrel but some of the old ones were to hard and they would actually blow apart from the more powerful caliber. The actions on some were recalled not sure if the headstone had the same problem .
I'd like to see it if it cks out ok for the build. I have several old war rifles and pistols. Always looking for others .
 
Hey Silver,

As I understand it was fairly common to rechamber the m1917 to .300h&h in the 50's. I will certainly research this more, and the causes of kabooms in these before I move forward. I will get pictures up soon.

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Don't bother to open up the bolt face. PITA when all you have to do is swap it for a Pattern 14 (.303 Brit) bolt body. You will have to headspace it anyway so go the easy rout. Sell your bolt body to someone who is looking.

I'm building a .585 HE on one right now and had no choice but to open the bolt face. The standard belted magnums will all work with the Pattern 14 bolt body. I built one in .300 Weatherby Magnum in just that way, swap the bolt body.
 
Thank you for the info. I went looking around for a p14 bolt, and boy oh boy 100 bucks! I ll definetly keep looking. It certainly sounds like a great way to go but not sure if I am wanting to spend that much.

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Thank you for the info. I went looking around for a p14 bolt, and boy oh boy 100 bucks! I ll definetly keep looking. It certainly sounds like a great way to go but not sure if I am wanting to spend that much.

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You only need the bolt body. All the rest of the bolt parts will fit. Springfield Sporters has them for $20.00
 
Aw I see where you wrote body before. 20 bucks aint bad. Good looking out, and thanks again.

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Just to make sure, isn't 300 H&H considerably longer than 30-06? Wouldn't it be too long to fit in the magazine?

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Some work is required with the magazine box and the feed ramp but not as much as could be suspected. It's also pretty straight forward. The .300 H&H is about .260 inch longer than the .30-06 in OAL
 
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