Tomorrows project/ .450 Ackley Magnum.

[Biggerhammer]

Just received the rifle, brass, dies and some bullets from "Jay. Sharkbait".

I was surprised how close the .450 Ackley Magnum is to my .450 Remington Ultra Magnum. The Ultra being slightly larger in case capacity and of course not having the belted magnum case. Which for the 450 Ackley magnum is not a bad thing. With such a small shoulder on the 450 Ackley Magnum. It will be nice to headspace off the magnum belt.

I will be fire forming .375 H&H cases to .450 Ackley Magnum using cream of wheat and pistol powder.

Thanks Jay for the classy rifle and chambering. I know you have a history with it.

Just keeping it all in perspective, these chamberings arent for the "Talkers" or the recoil sensitive types. Those who have shot true full house safari stuff know the true recoil these chamberings produce with full house 500gr bullet loads. Makes a .458 Win Mag or a .338 Ultra feel like a .308 Winnie.

Left to right

.450 Ultra Magnum/ 500Gr Hornady Interlock
.450 Ackley Magnum/ 500gr Hornady Interbond
.375 H&H Case(Parent case of the .450 Ackley Magnum).
6.5 Grendel cartridge/ 120gr Nosler BT
500gr Hornady Interbond bullet



.450 Ackley cartridge/500gr Interbond
.375 H&H case/ Parent case
500gr Hornady Interbond bullet

[Boss .300 winmag]

Did you find some mastodons to hunt owner there? 

[Biggerhammer]

Did you find some mastodons to hunt owner there? 

If I could find one, I'd give it a go with either of those wildcat .458 chamberings. So far this is the largest victim one of my .458 wildcats has planted.

[NRA4LIFE]

That is a cool looking rifle.  How do you fire form the .375 cases to the Ackley?

[257 Wby Mag]

Very cool project Landon! Is that a 1917 enfield? Got one sittin was thinkin 375 or 416 ish just because...

[HUNTaHOLIC5]

Tagging. Love the looks of that rifle 

[CAMPMEAT]

I've got a name for your gun, " BLONDIE ", because she rocks your world...ya think ?

[Biggerhammer]

That is a cool looking rifle.  How do you fire form the .375 cases to the Ackley?

You use a ample charge of faster burning pistol powder, which is considerably less than a full house charge of rifle powder. You drop the pistol powder charge in the case, then I pack a small wad of tissue on top and pack it with a proper sized wood dowel. I then use a powder funnel and fill the case with dry "Cream of Wheat cereal, then pack another small wad of tissue on top. Chamber it and fire it, the pressure of the faster burning pistol powder blowing the cereal out of the case expands the .375 H&H case to the .458 Ackley chamber. I then load the case with a mid range .450 ACKLEY load and fire it. Then the case is completly formed and its time to stuff as much powder in it as the case is capable of handling.

[jay.sharkbait]

Very cool project Landon! Is that a 1917 enfield? Got one sittin was thinkin 375 or 416 ish just because...

Yes. it's a modified 1917.

I would recommend .416 Taylor. Much easier to form brass (necked down .458 WM) and feeds better.

[Biggerhammer]

Very cool project Landon! Is that a 1917 enfield? Got one sittin was thinkin 375 or 416 ish just because...

You can use both those cases to form .450 Ackley cases.

[BULLBLASTER]

What kind of velocity dpes the ackley make with 500 grainers? 

[jay.sharkbait]

That is a cool looking rifle.  How do you fire form the .375 cases to the Ackley?

You use a ample charge of faster burning pistol powder, which is considerably less than a full house charge of rifle powder. You drop the pistol powder charge in the case, then I pack a small wad of tissue on top and pack it with a proper sized wood dowel. I then use a powder funnel and fill the case with dry "Cream of Wheat cereal, then pack another small wad of tissue on top. Chamber it and fire it, the pressure of the faster burning pistol powder blowing the cereal out of the case expands the .375 H&H case to the .458 Ackley chamber. I then load the case with a mid range .450 ACKLEY load and fire it. Then the case is completly formed and its time to stuff as much powder in it as the case is capable of handling.

I've had as much fun fireforming brass for that rifle as shooting it.

Just to put it into perspective, you can push a 500 Grain projectile at 2400 FPS with something like 6500 ft lbs of muzzle energy. Shooting the rifle does require proper form and correct shooting techniques. I don't think the rifle has ever been shot from the prone or a bench.

Here's to peeling your t-shirt off  your shoulder!!!!

Have fun, and I'm glad it went to a good home.

[Biggerhammer]

What kind of velocity dpes the ackley make with 500 grainers? 

It can push close to 2500 FPS  with a 500gr bullet. My .450 Ultra will push a 500gr Hornady slightly over 2600 FPS.

[BULLBLASTER]

  and i thought my h&h sending a 300 grainer at 2550 was painful!
You and sharkbait are a different kind of crazy! Id like to try one sometime tho.. 

[Biggerhammer]

But the real performers in these type cases are the CEB Dangerous Game Non-Cons (Tipped). They have been supper fast and accurate out of my 450 Ultra Magnum.

Here is a .458 CEB 370gr , Tipped Non-Con next to a .300 WSM case. Serious speed, penetration and expansion. What more could a guy ask for?