300 win mag or .30-06 for sabots?


February 11, 2008, 03:13 PM
hey guys,

I have been handloading .223 bullets into 7.62 30-06 cases with good results, ala reminton accelerators, but I was wondering, do you think the 300 win mag would be a significant step in terms of velocity? I guess I am wondering, when does the power curve stop with such light bullets?

Does anyone have more experiance with the higher 7.62 diameter cartriges?

30-378 whtby? I hear this might be overkill, and is a inefficiant cartridge.

interested in hearing your thoughts.

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February 11, 2008, 03:49 PM
Please define "good results".


February 11, 2008, 03:58 PM
What are you using for sabots?

If it were me, I would just shoot a .220 swift if you want that kind of velocity. A .22-06 could easily produce a barrel burning 4,000fps velocity and a .22-300WM could probably reach 5,000fps.

I don't know if you could find a .22 caliber bullet to hold up to that kind of speed, but hey... whatever floats your boat!

What exactly are you trying to accomplish here?

February 11, 2008, 04:00 PM
Well, I think Remington was claiming almost 4,100 FPS with the 30-06.

You ain't gonna get very much more then that, no matter how much powder you put behind it.


February 11, 2008, 04:02 PM
I have used the 30/378 Weatherby extensively for elk hunting.The cartridge is way overbore even for .30 caliber bullets. Its hard on barrels and expensive to shoot. It is a highly specialized cartridge that fills a narrow niche. I would guess that for .233 Sabots the /06 is still your best bet

February 11, 2008, 04:03 PM
I'd imagine that even with the biggest, baddest, .30 cal cartridge you can find; you're not going to gain more than a couple hundred fps over what you can ring out of a .30-06 with sabots.

IIRC, the maximum theoretical muzzle velocity produced by any round that burns smokeless powder is a little over 5000 fps, that being the speed of sound in the combustion gases.

Look over the sabot load data here (http://www.eabco.com/Reports/report04.html).

Regardless of what kind of velocity you can manage, can you hit anything with it?

February 11, 2008, 04:03 PM
to be honest? just messing around.

I like to hunt predators, and a fast moving light bullet is of course the standard, but I got some of these sabots and the idea of a multipurpose rifle is interesting anyway.

I have never benched it, just pop can tests so far, but it doesnt seem bad at all so far.

I plan on heading to the range week after next.

Plan on picking up a Stevens 200 el-cheapo 300 win mag to compare to the 30-06 savage, I just wondered if it was worth the $250.

it is a fun project.

February 11, 2008, 04:09 PM
I'm wondering about the stability of your bullets. I think most .308 or 30-06 rifles use a twist somewhere between 1-12 and 1-10 with 1-10 being very tight, while most .223 rifles go with 1-9 or 1-7. Now if you're using 55 grain bullets you're probably OK, but I'd be inclined to use something heavier and I doubt it would be that stable.

February 11, 2008, 04:14 PM
I doubt stability would be an issue with any but the heaviest .224" bullets. The ridiculous muzzle velocity (>4000fps) should get them spinning fast enough to stabilize, even with a slower twist barrel.

February 11, 2008, 04:51 PM
Whats the biggest bullet you can fit in the sabot. A 90 grain VLD might be interesting way out there.

February 11, 2008, 06:13 PM
Well, give it a try and then post a report. I never had the accuracy with sabots my 22-250 gives.

February 11, 2008, 07:05 PM
I never had the accuracy with sabots...

And neither has anyone else.;)


February 11, 2008, 07:40 PM
Every rifle I tried them in only yielded minute of BUICK accuracy.

We're talking Roadmaster not the lil dinky Regal

February 12, 2008, 09:11 AM
I found some of the info on some old barrel burners.

In 1960 Weatherby made a 30-378. Special Speer Bullets of 100 Gr. were driven at 5760 FPS. Special 30 Gr. Bullets were driven at 6438 FPS. About 1963 a 22-284 was used by Dr. Edgar Eichorn of Burroughs Corporation. A target grade Win. M70 was used to drive a 31.6 GR. Bullet to 5350 FPS.

About this time , Homer Powley and Robet Hutton got together and used a sintered Iron 15 Gr. bullet to get 6585 FPS which I believe is the all time Record . I won't list Loads cuz someone might get into big problems . Most of these tests were tied into Military questions about what happens at high Velocities . I don't know why ...because Escape Velocity ( to leave Earth ) is about 25,000 FPS.

PS ...let me know if you beat these Figures !!! We're going to want to see some pics!

March 10, 2008, 04:32 PM
As a matter of interest Gerald Bull (of HARP fame) used two 16 inch gun barrels to drive a 250 pound projectile at a velocity of 8,400 fps.

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