Curious. Is there any rounds based on a 2.8" 30-06 case ?

I Think in one of the Nordic countries someone made a litter of wildcats based on 9,3x74r with the rims turned down. One morphed into the 370 Sako. I like the idea of a long neck 2.8" case necked to 375.

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I like the idea of a long neck 2.8" case necked to 375

I use a 06 basic case trimmed to 2.65 for my 400 & 380PDKs.

Unless you are going to use a mag box longer than the std 06 of around 3.4" then the 2.8 case gains you nothing. The longer neck is simply filed with bullet. That is the limiting factor on the 370Sako.

I suppose the Gibbs line of wildcats might be, its as long as you could get an 06 case IMO..I never was that impressed with the one I had and cases were hard to make. The improvement was very little if you loaded the Gibbs wildcats to decent levels..Gibbs got those velocities by loading the bejesus out of them..

Orrrr......could you move and blow out the '06 shoulder forward, improve it, and reduce the case neck to near minimum for a repeater? Kinda a 30-06 JDJ with gentler shoulder. That should gain a significant amount of powder capacity. That way you don't need to lengthen the case.

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Originally posted by Colt Commander:
Curious. Is there any rounds based on a 2.8" 30-06 case ?

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Orrrr......could you move and blow out the '06 shoulder forward, improve it, and reduce the case neck to near minimum for a repeater

You can pretty much do what you want. I based on PDKs on a 280 case. Since the first one I built was the 280PDK I set the neck at .28 or one caliber. Others calibers have the body shoulder at the same point and the neck will vary.

Looking at the picture starting on the left 280PDK, 338-06, 340PDK, 375 Whelen, 380PDK (since this picture I've started using basic brass and they are now 2.65") 400PDK with 300 & 400gr bullets then the 375H&H.


My base case is very close to the Gibbs. Shoulder .46 and 40deg. Even with a touch more case than the Gibbs I always had trouble getting his velocity. When looking at Rocky Gibbs data you need to remember he measured his barrel length from the end of the bullet. So if he called it a 24" barrel by our measure it was more like 27.5". That makes up a lot of his claim.

Given same length barrel I've always been able to match the FACTORY magnums such as 7MM Mag 338Mag etc. As to velocity and still get 4-5 loadings. However I can't match my own magnum reloads.

Again unless you have a longer than 06 mag box a 2.8" case doesn't do much for you. I choose the 2.65" because on my 400s using the cannleure I ended up with an OAL that would just fit an 06 box.

Thanks for the replies.

I just got the idea that a 375-06 on a 2.8"
case blown out with the shoulder moved forward
May be an interesting project.

Imagine a drop magazine, 7 maybe 8 rounds?

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I just got the idea that a 375-06 on a 2.8"

The 375H&H is only 2.85.

I can post a picture of my 380PDK shoulder forward blown out but only 2.65" if you are interested. Unless the box is longer the longer neck is simply filled with bullet.

Just curiosity.......How close to 10.75x68 is the 400PDK?

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Just curiosity.......How close to 10.75x68 is the 400PDK

I show the 10.75 as being around 95grs of capacity the PDK will be about 10 grs less. They are the same length but the 10.75 is. .422 vs .411 the case has a base of .495 and shoulder of .48 vs my .471 and .46. I do load to 60,000 vs 48,000.

A 10.75 moves a 450 at around 1900 My 400PDK can move a 400 to 2350 but load 2265.

I believe I actually burn more powder than the 10.75.

Look at RIPs 400 Whelen thread. They are seating the bullet out to my OAL and are getting to about 100fps less. I just don't care for that much bullet sticking out.

YOu get more not less powder capacity by expanding the neck not reducing it, mostly because if you can seat the bullet out in a long throat you have powder capacity in about half of the neck or more, depending on the powder.

The best I have ever gotten in the 10.75x68 with a 400 gr. bullet is 2120 FPS and with the 350 gr. bullet is 2350 FPS and those loads were max plus in every one I built. Sure you didn't get a misprint on the 400 gr.

I can't imagine a worse wildcat than one base on the 10.75x68 case simply because its available in production about every 5 or 10 years, its totally unpredictable as to component availability. Other than that it's an overlooked and wonderful caliber in a bolt action rifle as is..

Today the best case for a non belted 30 caliber is the readily available 9.3x62, it has about a 8% case capacity over the rest and when set up with a long throat and 06 length magazine it will make them cook, as will the 9.3x64 as it works great in a 06 length magazine, and if you must be a belt basher..

All that said, I can't see where an unbelted case any advantage over the belted case in the larger bores, the only thing wrong with a belted case is some folks don't understand how to load it. It's been proving itself for a century or so and some folks still profess it as a no no! I mean surly the 375 H&H, 7mm Mag, 300 Win. mag, .338 Win. and 358 Norma have some usefulness in the big scheme of things.

Ray if you were asking me about a misprint I simply wasn't clear. The 2350 was a max load for my 400 PDK. Don't know the pressure but QL says it is in the 60,000+ range. at least 5 reloads with the same brass.

I dropped back to 2265. It fills quicker (doesn't need to settle and I have brass that is on it 10+ loading.

I agree shoulder forward and blown out gives you a lot more bang for the buck than longer neck. Unless you can seat the bullet out longer necks are simply full of bullet.

For the price a 30-62 would be a nice option.