Re-chambering an NEF from 300 WM to 300 H&H?

[redactor]

Now that NEF is making their HandiMag rifles, does anyone know if it would be possible to re-chamber the 300 WinMag into 300 H&H Mag? How much would such an operation be likely to cost?

Please don't ask me why I want to do this, because I don't have a good answer other than "I like old British sporting cartridges," "The T/C Encore costs too much," and "I want one."

 

[Art Eatman]

Better check the case dimensions. I believe that the WinMag case is larger, out at the shoulder.

 

[Vern Humphrey]

It is not possible -- the two cartridges have the same head size, but .300 WM is almost straight sided, while the .300 H&H is quite tapered. This means a short distance forward from the breech, the .300 WM chamber is wider than the .300 H&H. Running in a .300 H&H reamer will not "clean up" that wider portion of the chamber.

 

[TehK1w1]

I would also be worried about the strength of the lock-up mechanism-the NEF handi-rifle is a strong action, but there have been multiple reports of the new 500 S&W ones coming unlocked from the recoil.

 

[redactor]

I would also be worried about the strength of the lock-up mechanism-the NEF handi-rifle is a strong action, but there have been multiple reports of the new 500 S&W ones coming unlocked from the recoil.

I believe the 300 H&H Magnum has a lower max pressure than even the .30-06. Which, I suppose leads me to my next question... Is there another chambering like .30-06 that would work? Maybe I'm just dreaming...

 

[R.W.Dale]

Remember NEF now has a new MAGNUM action out. The SB3 I believe

 

[eliphalet]

Great place to do some comparison on rechamber/rebarrel

http://ammoguide.com/cgi-bin/aichamber.cgi?sn=BCoBjlsfvu


300 Wm to 300 H&H doesn't work.

 

[Matt304]

I believe the 300 H&H Magnum has a lower max pressure than even the .30-06. Which, I suppose leads me to my next question... Is there another chambering like .30-06 that would work? Maybe I'm just dreaming...

30-06 will not work for the same reasons described that the 300H&H will not work; it is smaller dimensions. The only way you can re-chamber is by increasing on dimensions.

What exactly are you aiming for here? I'd say just keep the 300Win, as you have a heck of a good chambering right there. You can already load down to 30-06 levels.

I heard about these guns opening from 500SW, but when I watched the videos it was like it was opening after the round was fired and not relieving any pressure. I'd want to look into that one though.

 

[jerkface11]

Just download the .300 win to .300 H&H levels and there you go.

 

[MachIVshooter]

Ummmmmm................why??

 

[wraco]

The 300 wm and the 300 H&H are one in the same. The advantage is with the 300 H&H in that it's more efficient with powder because of case design. Just check your Speer reloading manual and you'll see what I mean.

The 300 wm was Winchester's way of replicating the performance of the 300 H&H in a shorter action. The shorter action allowed Winchester to produce the rifle at a lower price, becoming competive with the Remington 700. We all know the pre and post 64 story.

The 300 wm is not more powerful than the 300 H&H. The 300 H&H was never upgraded to keep pace with the 300 wm, allowing folks to believe that Winchester had brought out a more powerful cartridge. The 300 H&H is a reloaders dream. Not many cartridges are as versitile as the H&H with light weight bullets. That long neck stablizes bullets of all weights. Here's a load I picked up from Coddington-- 150 gr bullet with 74 gr of 4350 @ 3400 fps. -- I load the 180 gr bt @ 3100 fps.

Something else, if you run short of 300 wby, the 300 H&H will work.

If you want a 300 H&H rifle it may be more cost effective to look for a good used one and leave the 300 wm as it is. --

Regards:
Rod

 

[ugaarguy]

Post #8
What exactly are you aiming for here? I'd say just keep the 300Win, as you have a heck of a good chambering right there. You can already load down to 30-06 levels.

Post #9
Just download the .300 win to .300 H&H levels and there you go.

Post #10
Ummmmmm................why??

Post #1
Please don't ask me why I want to do this, because I don't have a good answer other than "I like old British sporting cartridges," "The T/C Encore costs too much," and "I want one."

Maybe they'll offer the barrel accessory program for the SB3 action soon. Then you could perhaps get a smaller caliber heavy barrel that can reamed out for the 300 H&H. By then though it might just be cheaper to get an Encore. I think it's a neat idea because of what you want to do with it. Best of luck in your low cost .300 H&H quest.

 

[Clipper]

When it comes to .30s & .375s, there is H&H, and there's everyone else... I hope you can find what you're looking for.