Gentlemen,

We have updated our 450 Ackley data using our own Walterhog bullets.

450 Ackley

This is probably going to open a can of worms and I apologize in advance if it does. Have you done penetration tests with the Walterhogs? They look impressive. Do you use a "lathe"?

What is the weight of the bullet?

Nice.
CNC lathe turned.
470-grain/.458-caliber Walterhog FN copper monometal solids, read "470" in the table.

Looks more than multi-cannelured (like a Barnes TSX or "banded solid"), rather more like a bore-rider than true-driving banded, and only two of those few, widely-spaced, broad "bands" will be able to fully bear in the neck of the cartridge, but it seems to work very well in Saeed's rifle.

I wonder if the bearing surface of the "bands" are .4580" or .4585", given Saeed's latest experiments?

And do the inter-band diameters of the bullet seal the land diameter at about .4500" or are they they smaller diameter than that?

That first true cannelure nearest the nose of the bullet looks deeper/smaller diameter than the rest of the inter-band diameters.

And there does seem to be some ogive to the nose portion. Supposed to improve feeding?

Very subtle, Saeed.

Note 3.600" to 3.800" COL's.

I suggest calling this the Broad Band design: BB

Thus a BB FN: .458/470gr BB FN from Walterhog Bullet Werkes

You will of course notice the velocity of 2410fps with a 25 inch 1:14 Barrel. Thats the Ackley Mag at work. -Rob

The bullet weight was too obvious for me to notice.....

25" barrel Lilja 1:14" twist 450 Ackley, RemM700 rifle:

Old Hornady .458/500-gr FMJ (at assumed 3.600" COL):
W748 96.5 grains >>> 2410 fps, group 2.260"


Compare the much greater accuracy and higher velocity of the Walterhog BB FN .458/470-grainer with 3.800" COL (same rifle?):

RL-15 94.5 grains >>> 2466 fps, group 0.333"
VVN 540 99.0 grains >>> 2543 fps, group 1.049"

Humdinger loads. Surely Saeed was doing the loading and shooting, not Walter.

Personally I think the 450 Ackley is a much better cartridge than the 458 Lott. It has better performance and all three cartidges can be safely loaded in the Ackley chamber in a tight situation. I know that you can buy headstamped factory loaded Lott ammo which is a definate advantage but if the Ackley was thought of the same way the Lott was and promoted as the Lott was then it too would have been offered in factory ammo and would have been the better chioce. I would like to take a 450 Ackley and fire Ackley, Lott and 458 Winchester loads through it and see what the velocity differences are. We have a bit of a problem getting 458 Lott here in Canada but when I can get hold of some I will try out the test and let you know.
Take good care,
Dave

quote:

Originally posted by RIP:
25" barrel Lilja 1:14" twist 450 Ackley, RemM700 rifle:

Old Hornady .458/500-gr FMJ (at assumed 3.600" COL):
W748 96.5 grains >>> 2410 fps, group 2.260"


Compare the much greater accuracy and higher velocity of the Walterhog BB FN .458/470-grainer with 3.800" COL (same rifle?):

RL-15 94.5 grains >>> 2466 fps, group 0.333"
VVN 540 99.0 grains >>> 2543 fps, group 1.049"

Humdinger loads. Surely Saeed was doing the loading and shooting, not Walter.

All these loads were shot by Roy Vincent.

The absolute best I was ever able to get from a Lott was 2310 fps. The Ackley out performs the lot by 200 plus fps. It's also way more versatile as 470 MBOGO has stated. -Rob

That's good to hear, Rob, as I'm in the process of building one on a Mark X in .458 win mag...... Superior loaded me some 550 grain Woodleigh solids and softs.......I'll start loading my own soon enough. Do you think it's possible to push the 550 grainers to 2300 fps? Just curious........

We have not done any penetration tests on these solids.

But, the hollow points we use in our 375/404 for hunting have been very good penetrators.

We used the same design on different calibers - for the 9.3, 404, 416, 458 and 585. The accuracy has been very good so we left them as is.

Roy is the only person I would trust to shoot these calibers accurately.

We did try to get Walter to do it, but, as usual I got an earful of insults from him

"Listen, I made one BIG mistake when I agreed to go bird shooting with you that first time we met! And I have been regretting that decision ever since! So I am NOT going to make the same mistake again and shoot these brain jarring guns! Only you and your friend from Africa are brainless enough to enjoy this sort of punishment!"

"Does that mean you are not going hunting with me and my crazy African friend this year?"

"Of course I am coming! Someone has to keep an eye on you two to make sure you do not do stupid things. I remember that time I had to tear up the paper stickers you were going to see who can stick them onto the sleeping elephant's backside!"

"OK, we'll let you do it this year then!"

"Ha ha ha ha"

quote:

Originally posted by Robgunbuilder:
The absolute best I was ever able to get from a Lott was 2310 fps. The Ackley out performs the lot by 200 plus fps. It's also way more versatile as 470 MBOGO has stated. -Rob

I take your word for it, Rob, but that is amazing! How much more powder are we talking avout? 15 grs?

anyone shoot A-frames out of their ackley and if so what velocity are you getting

I doubt you'll have any problems getting 2300fps from 550 gr bullets. One other trick if your magazine is big enough is to load the bullets out a bit. Buy a Corbin cannelure tool and make a new cannelure where you want it then crimp the bullet in place. I found WW748 ball powder gave me the best results in the Ackley also. Damn fine cartridge and I'm glad to see it still has a following amon gst the brethren.-Rob

second recomendation on the corbin tool..