Ackley improved?

[truck driver]

Guy I think there has been a lot of newer cartridges that has followed Ackely's basic design and change to keep from infringing on patent rights.
Look at what Weatherby did with his cartridges. The 300 Wby is basically a 300 Ackely belted magnum that Wby changed the shoulder design to make it his own Ed was very impressed with P.O. Ackely's work. what Ed discovered was that he could hold down pressure with a long throat or free bore and not affect accuracy for a hunting rifle. I have been thinking on running a Ackely reamer into my 300Wby to change the shoulder thinking it might help with the recoil and get rid of the radius shoulder which I believe will easy some of the pressure it creates. I may be wrong on some of these things but they are my thoughts.

 

[Dwh7271]

TD,
I can understand your thinking on that but do not believe that is going to help much, if any. As you mentioned, due to the design of Weatherby cartridges and the double radius shoulder you're not going to get a lot of difference IMO from taking the shoulders to a straight 40 degree (Ackley).
The only way I know of with the existing design is to reduce the charge or find a powder that generates a lower pressure for comparable ballistics or shoot a lighter bullet.
The Weatherby is a thoroughbred. Hard to turn one of those into a sulky horse. :grin:
A limbsaver, maybe something for your cheek if it's hitting you there or new stock(which I think I remember you saying you already did). Another is to add a little weight to it.

 

[Dwh7271]

Would it be too much of a stretch to credit Ackley's designs with inspiring some of our more modern cartridges which feature large case capacity, straight walls, and sharp shoulders? Like the .300 WSM?

I'd agree with you on that. Seems that there have been quite a few shoulder modifications on some of the cartridges and I have to think at least some of that came about due to Ackley.
Barsness is good, I agree.

 

[tim629]

I have two ackley improved rifles and must say I love the fact that I don't trim brass.

I still measure it but have yet to need to trim. I use factory 280ai brass, and fireform for the 338-06 using 270brass which I feel confident that I could hunt with my fireforming load, or use my regular loads with fine results so fore me fireforming is just more practice but hunting load in a pinch

 

[truck driver]

It does seem that the fire forming loads shoot as good as the loads shot after forming.
Fire forming lets you get to know what the rifle is capable of and it's fun also.

 

[HTDUCK]

My last build was a 260AI ( thanks to Creedmore The Enabler ) on a 700 LA
Smith cut the throat WAY to long in it and he is in the process of setting it back and starting over.
Got about 100 rounds down the tube and nothing shot well at all.
Can't wait to get it back.

Creed built one for his daughter and it's a very accurate rifle.
He put a brake on it and the recoil is ZERO
His is on a 700 LA as well.

And correct, some of his cases are on the 5th or 6th reload and never been trimmed.

 

[Dwh7271]

Howard,
Smith gets that throat right for you and you are going to love that cartridge. I'm having a hoot with mine.
Mine seems to really like RL17 FWIW.

 

[HTDUCK]

I hope so !
We've had good results in Creeds rifle with H4831SC.

 

[Dwh7271]

I use 4831 SC in my fire form load. Good stuff.
The loads from here?
http://www.6mmbr.com/gunweek046.html