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.280 Ackley Improved (factory cartridge)

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pyro6999 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote pyro6999 Quote  Post ReplyReply Direct Link To This Post Posted: August/20/2008 at 19:57
its not much but i will go ahead and post them. hodgdon has a lot of load data on there web site also.
 
120gr nbt h-4831sc  65gr  3294fps
120gr ttsx h-4831sc  64gr 3311fps
140gr tsx hunter  61gr 3137fps
150gr nbt h-4831sc  60.5gr 3012fps
154gr horn interbond h-4831sc 59.5gr 2997fps
156gr norma oryx h-4831sc 59gr 2967fps
160gr sgk  aac-3100 58gr 2940fps
175gr speer grandslam  r-22 56gr 2822 fps


Edited by pyro6999 - August/20/2008 at 20:09
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Roy Finn Quote  Post ReplyReply Direct Link To This Post Posted: August/20/2008 at 20:28
Thanks pyro
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Urimaginaryfrnd Quote  Post ReplyReply Direct Link To This Post Posted: August/25/2008 at 01:47
R30069  4080 ft per sec 55 gr accelerator out of a 30-06
R30061  3140 ft per sec 125 gr  out of a 30-06
               2910 ft per sec 150 gr out of a 30-06
                2700 ft per sec 180 gr out of a 30-06
Seems to me if you drop the weight of the bullet down you can get the speed up quit a bit.  May be its just me but Im thinking walk closer rather than paying $70 a box of ammo or having to fire form brass.   I guess cost of ammo must be more important to me than it seems to be to some of you guys.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote pyro6999 Quote  Post ReplyReply Direct Link To This Post Posted: August/25/2008 at 05:57
Originally posted by Urimaginaryfrnd Urimaginaryfrnd wrote:

R30069  4080 ft per sec 55 gr accelerator out of a 30-06
R30061  3140 ft per sec 125 gr  out of a 30-06
               2910 ft per sec 150 gr out of a 30-06
                2700 ft per sec 180 gr out of a 30-06
Seems to me if you drop the weight of the bullet down you can get the speed up quit a bit.  May be its just me but Im thinking walk closer rather than paying $70 a box of ammo or having to fire form brass.   I guess cost of ammo must be more important to me than it seems to be to some of you guys.
cost is very important to us guys which is why we reload everything we own i can load an assload of shells for $70 and with the .280 ai your getting near 7mm mag performance from a non belted case
They call me "Boots"
375H&H Mag: Yeah, it kills stuff "extra dead"

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God Bless Chris Ledoux
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Roy Finn Quote  Post ReplyReply Direct Link To This Post Posted: August/25/2008 at 09:51
Walking closer is always an option. Now, for the guy who has the standard chambering, going to the "improved version" yields very little from a practical standpoint. I had my 280 Ackley build from the start as such and I don't have any regrets. Yes, fire forming is a pain in the arse, but once you do this, you are good to go. Ackley improved chamberings get longer brass life than there standard cousins, so that is a benefit as well. With the cost of factory ammo being what it is today, reloading just makes sense. If you do not reload, there is no reason to go Ackley improved. In the end, it is the sum of the improvements that makes the whole.

Edited by Roy Finn - August/25/2008 at 09:55
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jbar2506 Quote  Post ReplyReply Direct Link To This Post Posted: March/10/2009 at 07:40
I'm having an 280 Ackley Improved built. 26" Douglas Air Gauge barrel.  Will be shooting mostly 140/150 grain bullets. My question is, "What twist 9 or 10?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote pyro6999 Quote  Post ReplyReply Direct Link To This Post Posted: March/10/2009 at 08:58
1:10 for your given rates.

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375H&H Mag: Yeah, it kills stuff "extra dead"

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Post Options Post Options   Thanks (0) Thanks(0)   Quote supertool73 Quote  Post ReplyReply Direct Link To This Post Posted: March/10/2009 at 09:13
Originally posted by pyro6999 pyro6999 wrote:

1:10 for your given rates.



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Post Options Post Options   Thanks (0) Thanks(0)   Quote kelly1278 Quote  Post ReplyReply Direct Link To This Post Posted: June/08/2009 at 18:36

Has anyone tried the berger vld hunting bullets in their 280ai if so what powder worked best

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Roy Finn Quote  Post ReplyReply Direct Link To This Post Posted: June/08/2009 at 19:19
I would try VV165. I have also had good results with the old standby powders like IMR-4350/4831 with 140's.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bigdaddy0381 Quote  Post ReplyReply Direct Link To This Post Posted: June/09/2009 at 06:35
Originally posted by kelly1278 kelly1278 wrote:

Has anyone tried the berger vld hunting bullets in their 280ai if so what powder worked best

 
160gr nosler accubond and H414 or varget.
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kelly1278 Quote  Post ReplyReply Direct Link To This Post Posted: June/10/2009 at 18:09
i was thinking about the 168 vld . my barrel is a 9 twist lilja should shoot them pretty well . any suggestions ?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote John Barsness Quote  Post ReplyReply Direct Link To This Post Posted: June/11/2009 at 20:45
The loads pyro6999 quotes are from an article I wrote for HANDLOADER magazine. They were chronographed in a 22" barrel. Not bad!
 
The .280 AI is a fine cartridge. If you think there really is a big difference between the .270 and .30-06 then it kinda splits the difference.
 
Personally, after using it some, I think the .270 and .30-06 are pretty much the same thing. Load any of them with 140-165 grain bullets and they're good to go. But the .30-06 will do more at the "big" end.....
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Roy Finn Quote  Post ReplyReply Direct Link To This Post Posted: June/11/2009 at 20:49
I've been trying to tell these guys the same thing about that poor, old, broken down 30/06 and they don't listen. Maybe now that the "Voice" has spoken.....................well ya know
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Post Options Post Options   Thanks (0) Thanks(0)   Quote pyro6999 Quote  Post ReplyReply Direct Link To This Post Posted: June/11/2009 at 21:03
Originally posted by John Barsness John Barsness wrote:

The loads pyro6999 quotes are from an article I wrote for HANDLOADER magazine. They were chronographed in a 22" barrel. Not bad!
 
The .280 AI is a fine cartridge. If you think there really is a big difference between the .270 and .30-06 then it kinda splits the difference.
 
Personally, after using it some, I think the .270 and .30-06 are pretty much the same thing. Load any of them with 140-165 grain bullets and they're good to go. But the .30-06 will do more at the "big" end.....
 

i personally feel like the .280AI has that added "cool" factor to it that the others simply cant compete with. other wise yeah they are so close its not funny.
They call me "Boots"
375H&H Mag: Yeah, it kills stuff "extra dead"

343 we will never forget

God Bless Chris Ledoux
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Post Options Post Options   Thanks (0) Thanks(0)   Quote John Barsness Quote  Post ReplyReply Direct Link To This Post Posted: June/11/2009 at 21:09
Well, my voice may be somewhat jaded.
 
It's just as I've gotten older and shot more animals with various cartridges I've seen less and less difference in how they, uh, "perform."
 
If you know the rifle and shoot anything from a .270 on up to a .300 magnum, then the bullet and shooter make more difference than a few degrees in shoulder angle, or whether a bullet weighs 130 or 180 grains or starts at 2700 or 3200 fps.
 
It's fun to try for the the exactly perfect cartridge, but we care about the ballistic trivia more than the animals do.
 
The .280 gets about 50 fps more than the standard .280 with the same bullet weights at the same pressures, and maybe 100 fps more than the .270 Winchester.
 
It also gets about 100 fps less than the .30-06 with the same bullet weights loaded to the same pressures. Yeah, 7mm bullets have a little high BC, everything else being equal, but out to 500 yards there just ain't much difference even in the numbers, much less what happens when the bullet hits.
 
Sectional density also makes zip difference when using the better modern bullets. My wife has shot a number of 600-1000 pound big game animals with bullets weighing 130-165 grains with rounds like the .270, .308 and .30-06. The animals included elk, moose, zebra, kudu, wildebeest, etc.
 
Since Eileen is careful about bullet placement (and has shot a lot of animals so knows something about it) they all died very quickly. All the bullets either ended up under the hide on the far side (even on angling shots, some through the big shoulder joint) or went on through. I dunno how a .280 Ackley would have done better--especially since I have seen it at work some too.
 
But ain't it fun to agonize over tiny theoretical differences!
 
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 300S&W Quote  Post ReplyReply Direct Link To This Post Posted: June/11/2009 at 21:28
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Post Options Post Options   Thanks (0) Thanks(0)   Quote pyro6999 Quote  Post ReplyReply Direct Link To This Post Posted: June/11/2009 at 21:34
id rather have to many chamberings to pick from than not enough, but im missing a screw or two.

well so ive been told.
They call me "Boots"
375H&H Mag: Yeah, it kills stuff "extra dead"

343 we will never forget

God Bless Chris Ledoux
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Lrangepro Quote  Post ReplyReply Direct Link To This Post Posted: September/14/2009 at 18:33
I've been using the 168 VLD's for 500 to about 1300 yards and I'm very pleased. Powder to try is Reloader 17. I'm getting really good groups @ about 3030fps but I've had it up to over 3100fps with not much of a pressure sign at all. I do have a 27 inch barrel, 1-9 twist. Shoots best at 2950-3050.  It also shot really great at about 2750 (about 50 grs I believe) but I wanted to see what it would do.  Start at about 49 grains to be safe and work up. There is no load info for this that I know of except what I have posted on the net. I dont want to list my load because I think its more than most guns might take but RL 17 is worth a try. It seems like this powder would be too fast but its not. I will explain why if anyone would like to hear about it but for now just trust me. About 1.5 to 2 inches at 500 yards is the norm, sometimes even better. Pretty much one hole at 100 but I shoot much farther so I test farther. I'm getting some 180's to try next.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote koshkin Quote  Post ReplyReply Direct Link To This Post Posted: September/15/2009 at 17:36
If I did not already have a 280Rem, I would definitely try 280Ackley.  It just sounds like a very cool cartridge and let's face it, we all doing this for the fun of it.  I have firearms chambered for 280Rem, 8mm Mauser, 7.62x54R, 308Win, 7.5x55Swiss and 7.5x54French.  For any practical purpose, these are essentially interchangeable.  

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