30-06 with 30 degree shoulder?

[thefitter]

Anybody ever heard of this? Not asking about a AI.

Thanks

 

[CatShooter]

Anybody ever heard of this? Not asking about a AI.

Thanks

Yup... it is a Mashburn.

He did a lot of wildcats, and prefered the 30 degree shoulder.

 

[thefitter]

Thanks. I started reading up on shoulder angles and found this:

http://www.reloadersnest.com/article_shoulder_angle_oct2603.asp

and this:

http://www.angelfire.com/ma/ZERMEL/twist2.html

and this

http://www.longrangehunting.com/forums/f28/there-any-downside-40-shoulder-74757/


Main points seem to be that a 40 degree shoulder (AI) has possible feeding, turbulence and doughnut issues.

Thoughts? Opinions?

I was thinking of doing a 7mm-06 with a 30 degree shoulder. Not sure what to call it...7mm-06 TFI (The Fitter Improved? 8))

Thanks

 

[XTR]

Thanks. I started reading up on shoulder angles and found this:

http://www.reloadersnest.com/article_shoulder_angle_oct2603.asp

and this:

http://www.angelfire.com/ma/ZERMEL/twist2.html

and this

http://www.longrangehunting.com/forums/f28/there-any-downside-40-shoulder-74757/


Main points seem to be that a 40 degree shoulder (AI) has turbulance and doughnut issues.

Thoughts? Opinions?

I was thinking of doing a 7mm-06 with a 30 degree shoulder. Not sure what to call it...7mm-06 TFI (The Fitter Improved? 8))

Thanks

I think you are late to the party...

link

 

[swd]

The 280 Ackley has a long track record for great accuracy and it feeds fine. Other than having your own wildcat I'm not sure it makes much sense.

 

[thefitter]

So the turbulence and doughnut theory's are BS?

 

[sdean]

Split the difference and do a 35 degree. Works well for Wsm and 6.5x284.

 

[swd]

As for turbulence, the excellent accuracy of the 280 Ackley is well known. Start with factory 280 Ackley brass and the doughnut is a non issue. I've built at least 5 280 Ackley's for clients on Winchester's, Remington's and 1 Mauser and every rifle fed great with 0 feeding work. I have no doubt that a 30 degree 7mm-06 or 280 would be an excellent cartridge. Better than one that we already have? I don't know, my guess is it will probably be about the same. Have a reamer ground and dies made and let us know.

 

[CatShooter]

So the turbulence and doughnut theory's are BS?

Yup...

 

[GSPV]

Rather than a 30 degree 7 ought six, consider a 284 Shehane.

Lots of good data available. Lapua brass. Diies easily available.

 

[wapiti25]

I would look at what brass you can get first. I do like a 30* shoulder and it seems to work in a lot of cartridges. I have been thinking of building a 6.5-06 30* IMP using 270 win brass, I like a long neck on cases. Laupa does make nice 30-06 brass and I have used it for 6.5-06. If you go with the Nosler 280 AI brass be aware that it is slightly different than the wildcat 280 AI, that is what I heard from people online. I use a 7mm Rem Mag and Berger 168's for long range hunting, my hunting rifle (8 1/4 lb) will shoot sub MOA @ 600. I had thought about a match rifle using my 7 Mag reamer, it is very easy to load for and shoots good. Dave and I worked out the reamer with a min neck and throat for the 168's, I do neck turn Winchester brass until it almost cleans up but can still shoot some factory brass if needed. In a 24.5" Kreiger barrel it chronographs at 3050 ft/sec. without showing pressure.

 

[JabaliHunter]

Anybody ever heard of this? Not asking about a AI.

Thanks

Yup... it is a Mashburn.

He did a lot of wildcats, and prefered the 30 degree shoulder.

interesting. Hard to find any references to a 30-06 mashburn. A few references to a 30-06 icl but not sure of the dimensions. Anyway, a 30-06 improved 30 degree shoulder would be interesting, but whether it would give any real world benefits over ackley,s 40 degree version I don't know

 

[M14AMU]

The standard 30/06 doesn't need anything but shooting!!

 

[savagedasher]

My first build was 300HH Mashburn That was 53years ago. Mashburn and Ackley were well known back then. Ackley has some of Mashburn loads in his books. Merry Xmas Larry

 

[cmillard]

there was an article in precision shooting magazine a few years ago that had one featured on the front cover. very nice looking rifle.