450 Ackley mag any thoughts

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I cam across a 450 ackley mag and I know nothing of the cal and can not find any data in my books. any info would be good about this canon:slap:
 
The Lott is probably a better choice. According to Cartridges of the world, the 450 Ackley is a necked up and improved 375 H&H (the real king of the 375's). It offers virtually identical capacity and performance to the Lott, though it does have a small shoulder and is therefore not interchangeable with the Lott. Load recipies are most likely identical
 
I think any time you get into the Ackley "so-called" Improved cartridges, it's kind of something you have to want and believe in very badly, cuz I think about 98% of the hunters out there will have no interest in them. :rolleyes:

Reloading for them is a p.i.t.a. Re-selling them is a p.i.t.a.
The only people who believe an extra 25fps MV matters is the hard-core A.I. guys. :rolleyes:

All it is, is a tiny little change and movement of the shoulder to add a few grains of powder and whole lot of head-ache IMHO. :rolleyes:

I do not believe they are improved one iota actually... :rolleyes:

I'd like people to understand that I have no use for Ackley Improved cartridges.

TBart, I'm double-emphasizing that one...

I believe the .458 Lott is the best of the .458 calibers. But the .450 Rigby is a nice one too; a bit trickier to find components for maybe.


However, if the thing turns your crank then go for it.
 
I feel the same way about all the Short Magnum and Ultra-Mag cartidges.......................Harold
 
I had a 450 ackley some years ago, it can be formed easily from 416 rem brass. not worth the effort over the lott, but it did spit out the 500gr hornady at 2400fps and was very accurate.
 
There's loading data for the .450 Ackley in the A-Square manual; recommended powders are H-4895, IMR 4064, and Re-12. Top velocity makes 2400 fps with A-Square's 465 gr bullet, so Lott performance is what can be expected. Another cartridge that would be similar is the .460 G&A, which could be approximated by running a .375 Ultra case over a .458 expander.
 
Demo, while for the most part with Ackleys people just raise the pressure to get more speed the .375 is one that takes a big jump when Ackley'd. It'll pretty much go an extra 200 fps. with normal pressure.
 
The increase in performance is proportional to the increase in capacity. Ergo, cases with long necks and lots of taper (like the H&H) gain the most
 
I had a #1 in 450 Ackley mag, like Grit said, it was easy to neck up 416 brass, my boss at the time NEEDED it and offered me too much money to say no....if I was to do it again, I would personally go the 458lott.
 
MTM said:
Demo, while for the most part with Ackleys people just raise the pressure to get more speed the .375 is one that takes a big jump when Ackley'd. It'll pretty much go an extra 200 fps. with normal pressure.
Click to expand...


I don't buy the Ackley Improved thing but that's just me. It's only an opinion.

I may be resistent to change. I often wonder if this were 1888, would I be slamming the .8x57? If it was 1906 would I be dissing the .30-06 or the if it were 1912 would I be running down the .375H&H etc...

I bet Gatehouse would have endorsed every one of 'em back then! ;)


But on this topic, I would get #1) .458 Lott #2) .450Rigby, that is assuming it has to be a .458cal.

If that is not necessary then I would opt for the .416RM.
 
The 450 Ackley is better designed than the Lott in my opinion. It has a standard neck that holds bullets firmly in place...Something that is easy to screw up with a straight tapered case (Lott and 458 Win). At these recoil levels the magazine box acts like a battering ram tring to drive the bullets into the case.

The Ackley requires a two die set rather than a three die like the Lott and 458 Win use.

Pressure to pressure the Ackley is about 100fps faster.
The Ackley is best loaded in the 2300-2400fps range while the Lott functions best between 2200-2300. Both can be pushed faster, but I wouldn't.

416 Rem brass works perfectly....Just don't use the nickle cases (they split).
 
X-fan said:
The 450 Ackley is better designed than the Lott in my opinion. It has a standard neck that holds bullets firmly in place...Something that is easy to screw up with a straight tapered case (Lott and 458 Win). At these recoil levels the magazine box acts like a battering ram tring to drive the bullets into the case.

The Ackley requires a two die set rather than a three die like the Lott and 458 Win use.

Pressure to pressure the Ackley is about 100fps faster.
The Ackley is best loaded in the 2300-2400fps range while the Lott functions best between 2200-2300. Both can be pushed faster, but I wouldn't.

416 Rem brass works perfectly....Just don't use the nickle cases (they split).
Click to expand...



Just use a Lee Factory Crimp Die on your straight walled Lott and the problem is solved. I ordered one direct from Lee Precision. :)
 
The advantage of the Ackley over the Lott is that you can shoot Lott ammo in an Ackley, but not the other way around. There is next to no ballistic advantages. I can push a 500gr bullet 2400 fps. from the Ackley. Basically, like shooting a 22 short, long, and long rifle in a rifle chambered for 22 LR, I can shoot 458 Win Mag, 458 Lott, and 450 Ackley in my Ackley. Very handy out on the veldt, lol. Oh, and you make brass from 375 H&H (which ends up just a tad short) or belted magnum basic brass (which Norma used to make, and Hornady now makes). - dan
 
Dan the Lott can be pushed to 2400fps MV. I have fired loads in mine at 2350fps MV. But why would you want to? So what advantage do you see in the Ackley cart' other then being able to long dink the Lott cartridge?

There is nothing on this planet that the Lott cannot kill at the sedate 2200fps MV.

FWIW I load mine to 2235fps (I may have already mentioned that).
 
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