Anyone use a 8mm/RUM or 8mm/378 WBY

[Tang]

Trying to find some information on both. Wanting to build a wildcat on a Savage action. I was told this would be a great forum to find information on some big boomers.

Thanks

[MudRunner2005]

Why not just rebarrel it as a .338-378 Weatherby Mag.

That's a real "big boomer".

I have a 7mmSTW...which is an 8mm necked-down to a .284 caliber bullet.

It's a hot-shooter. I enjoy the hell out of it!

Why not just go with a 7mmSTW???

You can find ammo for it, you can shoot 1,000+ yards with it...and it will take down ANYTHING on the PLANET!!!


I'd suggest either a 7mmSTW.......or a .30-378 Weatherby Mag. or a .338-378 Wby. Mag.


Of the three, my top choice would be the .30-378 Wby. Mag...but ammo will cost you about $100-130 a box!!!

7mmSTW ammo will run you about $50-70 a box.

And .338-378 Wby. Mag. ammo CAN run you close to $200 a box!!!


So, I'd stick with a 7mmSTW...bad-ass round, and will do whatever you plan to use it for!

Even scare the shit out of other people at the shooting range, when you fire it!!!

However, I'd strongly recommend a muzzle-brake.

I'm no little, weak guy...by ANY means...

But...It's not the politest round on your shoulder, if you plan on shooting it all day long.......don't be a fool......get a muzzle-brake!

[JPRITT]

holy crap slayer! no more coffee for you. that wore me out trying to follow that post.

[4xforfun]

I think the biggest drawback with an 8 mm is bullet selection, or lack there of. You will be very limited on your bullet selection.

Another problem would be cost. This is a wildcat.....no factory dies. Custom dies are not cheap!!! Best case would be a bushing die with proper bushings. I did some costom loading for a 7mm-300 wby and simply used my 300 wby neck die with the proper bushings. I don't know that this would work with what you want. As far as FL sizing a wildcat with a standard die......I think you would be out of luck.

I agree with the other guys....7 stw, 30 378, 33 378, or a Lapua.

But, if ya gotta do it....let us know how it works out!!!

Good luck, and have fun!!

[Tyler Kemp]

8mm bullets have sucky BC's, 338 is definetly the way to go.

[MudRunner2005]

Like I've said before...sometimes I get a wee-bit bored @ work.

Plus I felt he needed all the facts before he gets into "big boomers".

You don't necessarily want a gun that that's so damn big, that you can't afford the ammo, to make it go BOOM!

You know?

I mean...he's a "Newb" on here, so, I don't know how far his "big boomers" knowledge extends???

Hahahaha!!!!

[Marine sniper]

If there were a decent bullet for the 8 mm the 8/ 378 would be a great cartridge, but there ain't so go with the 30 or 338/378.