.300 H&H action?

[BigUglyMan]

Could that result in any potential weakness/failure of the ejector in the long term, or is it a fairly small amount of metal that has to be removed?

You end up removing about half of the depth of the ejector. If you make a habit of cycling lots of loaded rounds through the action then over time I would think you run the risk of deforming the ejector.

Also just in general, would the bolt face of a standard rifle like an 8x57 or .30-06 have to be opened up in a conversion, or would feed rail and magazine length modifications be all that's necessary?

Any standard (.473") case head will have to be opened up to magnum (.532") size. That's why I recommend starting with a magnum donor

In addition, is a lengthened magazine something of a gunsmith-only job or is it accomplishable with a few ordered parts and some sandpaper?

Order an H&H-length mag box and follower and you're away to the races. Squaring off the rear of the feed rails is best done with a fine file. Same file will work for relieving the ejector.

 

[Kevan]

I have hunted with a 721 Rem. in 300 H&H since 1962.
It and the 375 H&H have been my main hunting cartridges since that time..

 

[longbranch*]

Last year Gary Flach of Langly,BC. rechambered my .30-06 Winchester 75th Anniversay model 70 to .300H&H. Cost was about $450 as I recall. Very happy with his service.
A few years ago I had another model 70 that started life as a .338 rebarrelled to .300H&H, but found it overall heavy for the caliber. Cost of opening the bolt face from a standard cartridge and working the rails was worth the weight saved over a Magnum donor rifle in my opinion.
Mr. Flach is a member on this sight. Highly recommend him.
Cheers

 

[Kilo Charlie]

I just bought a Remington 700 Classic so chambered. It appears to be a standard long action.
Brass is a bit difficult to find at times, but since Hornady and Nosler both make it, nothing to worry about unless you plan to shoot that rifle a whole lot.

 

[BigUglyMan]

The ubiquitous 375 H&H becomes 300 H&H with little fuss. The pricey 300 Wby also accomplishes the same thing.

 

[Why not?]

It also make fine 340 Wby brass.

Ted

 

[BigUglyMan]

The 11th Commandment - Thou Shalt Not Turn 300 H&H Brass Into ANYTHING ELSE!!!

 

[Why not?]

The 375 becomes 340, and later becomes 300 H&H. Amazing what one can accomplish with a propane torch and some water.

Ted

 

[BigUglyMan]

The 375 becomes 340, and later becomes 300 H&H. Amazing what one can accomplish with a propane torch and some water.

Ted

I should have known that you wouldn't be advocating swimming upstream like that!

 

[longbranch*]

Try to avoid building it into a heavy rifle. I've owned several .300H&H's from a Husqvarna, 4 pre-64 Win's and and a P17 action full custom (waaaay to heavy action). I'm happy with the one I had rechambered from a .30-06 new production Winchester 70 with its original 24" pipe.
Just my opinion.