300 win mag or .30-06 for sabots?

[dom1104]

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.

 

[USSR]

Please define "good results".

Don

 

[Markbo]

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?

 

[rcmodel]

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.


rcmodel

 

[sachmo]

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

 

[JesseL]

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.

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

 

[dom1104]

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.

 

[elmerfudd]

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.

 

[JesseL]

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.

 

[Seafarer12]

Whats the biggest bullet you can fit in the sabot. A 90 grain VLD might be interesting way out there.

 

[1911NM]

Well, give it a try and then post a report. I never had the accuracy with sabots my 22-250 gives.

 

[USSR]

I never had the accuracy with sabots...

And neither has anyone else.

Don

 

[R.W.Dale]

Every rifle I tried them in only yielded minute of BUICK accuracy.


We're talking Roadmaster not the lil dinky Regal

 

[Markbo]

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!

 

[pengmcic]

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.