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RickF -

That is probably the best reason for choosing the .280 Rem AI.

I'm building a 6.5mm-06AI for much the same reason - the Interarms mark X Action I had to work with was a standard (.30-06) size and I didn't want to mess with the bolt face and rails to build a .264 Win Mag.

To be candid, though, I have to admit that it would have been cheaper to sell the Interarms action ad buy a .264 win Mag. The problem was I still woudn't have had the rifle I wanted, which includes a heavy match-grade, fluted, stainless barrel , trued action face, lapped lugs, pillar and glass bedding, custom engraving, etc. Sometimes it isn't about saving money.


Coyote Hunter - NRA Patriot Life, NRA Whittington Center Life, GOA, DAD - and I VOTE!

No, I'm not a Ruger bigot - just an unabashed fan of their revolvers, M77's and #1's.

A good .30-06 is a 99% solution.
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Originally Posted by Coyote_Hunter
Originally Posted by castandblast

Primarily, but you moved to 175's and still subtracted barrel length, so I thought it might be worth pointing out that not all the #6 data was shot from the 26" barrel.


OK, here�s data from Nosler #5 for the .280 Rem AI and the 7mm RM, all from 24" barrels. Draw your own conclusions.

140g @ 3340fps, 67.5g Re22, 7mm RM
140g @ 3196fps, 63.0g Re22, .280 Rem AI
===============================
+ 144fps, 4.5g powder, 7mm RM

150g @ 3248fps, 63.0g IMR4350, 7mm RM
150g @ 3107fps, 63.0g IMR7828, .280 Rem AI
===============================
+141fps, same powder charge, 7mm RM

160g @ 3112fps, 79.5g H870, 7mm RM
160g @ 3058fps, 63.0g Re22, 7mm RM (Since H870 is no longer available)
160g @ 2963fps, 61.0g N165, .280 Rem AI
===============================
+149fps, plus 18.5g, 7mm RM (H870)
+95fps, 2.0g powder, 7mm RM (Re22)

175g @ 2970fps, 62.5g Re22, 7mm RM
175g @ 2828fps, 58.5g IMR7828, .280 Rem AI
===============================
+142fps, 4.0g powder, 7mm RM

Yep, I'm not debating anything here, just pointing out that not all the #6 data was shot with a 26" barrel. Guess I should have been more clear about that and saved you the trouble of digging up more data!

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Bob,
Doc has it in the right perspective. It's another neat cartridge. I have been playing with both the 280AI and 7RM as mentioned in my previous post and am finding that since the 7 Mag is throated deep it looks like a guy might get all the 7828 in the case it will hold and still allow a bullet to seat without too much pressure or at least no mechanical signs of too much.. I can do that with the 280AI but it won't hold much over 64gr of powder with a 140 in it and the 7 seated long for the deep throat will hold mid 70's and it looks like 3400 fps is a real possibility with a 140. Like you mentioned 7 Weatherby velocities if the chamber and throat are right which for me is a pleasant surprise.
I like the 280AI in the NULA. Chambers a round well and shoots very accurate and it's another neat cartridge. Hope to get out if it's not too hot tomorrow and ring both of them out a little more.


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Dave: Good luck with it;it's another good cartridge along the same lines as a 270 or 280,and suited to the same purposes. wink




The 280 Remington is overbore.

The 7 Rem Mag is over bore.
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Originally Posted by BobinNH


Good though the 280AI may be(it IS a good cartridge), if I'm gonna run around with a 30/06-length action and a 24" barrel,I'll take the 7RM everytime.


Which is why the best 280 AI may be the 7mm SAUM grin.

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Well, GN, it sure could be! wink 'Cept they never chambered a M70 for it.... whistle




The 280 Remington is overbore.

The 7 Rem Mag is over bore.
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Bob,
Got out this evening and it was a little humid but a great evening to shoot and I even had time to set up the Chrony. Here is what the NULA 280 Ackley Model 28 w/24" barrel did.
140 TTSX Barnes 63.5g N165....... 3100, 3153, 3136, 3119.
140 Nosler BT 60g IMR 4831....... Err, 3154, 3133, 3102
Both loads grouped under .500" @ 100 yards with no signs of pressure. Nosler Brass and Federal 210M primers.

Same range session 7MM Remington Magnum 25" Spencer Barrel
140 TTSX Barnes 71g IMR 7828 .....3235, 3279, 3275, 3289, 3258
Norma Brass and CCI Magnum primers
New lot of powder. Older Tin can container to the new round plastic container. Gave up about 40fps from the last range session and the old lot of powder. No pressure signs. Gonna go up in powder and see where it tells me to stop. Group size was in the 2's.
I don't think there is much more in the 280 but I'm thinking there is in the 7MM. With that being said I think I'll get real friendly with both rifles and see if I can find something to try them out on this fall.
The real thrill for me today was my 14 year old shooting his Tika T3 in .223 off of a Harris Bipod and shooting under an inch @100 all evening.

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Dave:I would say those are very good velocities and accuracy from both,and at least with the 7RM,within my "comfort zone". Both are very good things,and both will work real well on any task suited to them.

Your 280AI velocities are about 50-70 fps faster, on average, than what I have gotten from the 280's I've shot with RL22 and 140 gr bullets.

We pay our money and we take our picks.

I have been there pushing the 7RM to 3300 with the 140,and am honestly happy at the velocities you're getting with the 140's at present.

By analogy,the 7 Dakota I am working with does 3375 with the 140 AB and I am certainly no better off than you,and the BIG difference between,say, the Dakota and 7RM is that the Dakota "easily" does what the 7RM does at max,and more;just as the 7RM does what the 280AI does at max,and more.The "constant" is the greater powder capacity of the larger case,which is my only real point.....a smaller case can only get the same velocity as a bigger case if the smaller case is loaded to higher pressure,all other things being as equal as they can.There is no getting around this that I know of.

Glad you son is doing well with the 223....I love shooting mine! wink





The 280 Remington is overbore.

The 7 Rem Mag is over bore.
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Come on, The 280 AI and the 7 Rm are both great. They both have there pros and cons.

The 7 Rm can be pushed faster.

The 280 AI is more efficent.

The 280 AI is not belted. A plus to some. Brass WILL last longer in the 280AI.

I have a 280 AI and it is fantastic. I built it to shoot longe range. And I love it. I also have a 7 RM that is a lightweight, It is a good gun built for two entirely diffrent purposes.

If I had to pick one. Hands down the 280 AI is the winner.And lets not forget this catridge does not need fireforming anymore. Both cartrides will be around for ever.

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Originally Posted by 257
Come on, The 280 AI and the 7 Rm are both great....


Yeah, I think we established that.We were discussing which one was faster.... wink




The 280 Remington is overbore.

The 7 Rem Mag is over bore.
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It's a shame the first 8 post dealt with the 280AI from there it was about 7mag vs 280AI.


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Roper,
I have shot my 280AI out to 300 yards on a couple of occassions if that is considered long range. The way it performed was good and the trajectory was as I remember pretty flat. I was about 1 3/4" high at 100 with a 140 Nosler BT @ 3100fps or there about and it took one click up on the scope to get the point of impact in the X ring on a 6" splatter bull.
I think the thread has ran so long because the discussion has been very friendly and laid back and there have been a few wrinkles thrown in along the way. With that being said as soon as the weather straightens out and we get a few dry days so I can cut the bottoms on my farm I'll be able to stretch the 280AI out to 500 yards and give all a report on the results. Hopefully we are only about a week away.
Good Shooting!!

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Don't mean to get into a contest but orginal question was "Is anybody using a 280 ackley improved for long range, or has anyone used one in the past?". This is a LR hunting forum.

Some of the earlier post was about using 1/8 twist barrel with 180gr VLD Berger Hunting bullets. That all ended when somone decided the 7mag was better than the 280AI. I shoot a Kreiger barrel 280AI as I said shame we didn't talk more about the 280AI.


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Roper,
A 280AI chambering a 180 Berger VLD would be a special deal. With the bullet ogive of the 180 Berger and trying to chamber a rifle to seat that thing just right in the neck would make it a little different but that would be one bad piece if a guy could get that 180 out the muzzle about 3000 fps. 26" tube and lots of something pretty slow might get it done.
The NULA I shoot in 280AI seems to be pretty accurate. It likes N165 (thanks Tim in TN) and IMR 4831 awful well. I've been messing with some 120 TTSX's but cannot seem to get them up to speed and nearly as accurate as a 140 in almost any flavor. Not sure but I think the barrel on mine is a 1 in 10. Need to confirm that.
62.9g of N165 or 60g of IMR 4831 behind any 140 is around 3140 and shoots real well especially for such a light rifle. What does yours like??

Dave

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Try some H4350 with the 120 grain bullets. It should deliver both speed and accuracy.


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HBB,
Thanks for the suggestion. I was thinking after trying some slower powders that maybe with the lighter bullet the gun would like a little faster burning powder. I'll give some H4350 a try.

Dave

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Originally Posted by BobinNH
Originally Posted by 257
Come on, The 280 AI and the 7 Rm are both great....


Yeah, I think we established that.We were discussing which one was faster.... wink


Dont know why your trying to figure out which one is faster. The 7RM is faster. If you stay with safe loads(the same pressure) The 7Rm is faster. It has more case capacity!! DUHHHH!!

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Originally Posted by RaceTire
HBB,
Thanks for the suggestion. I was thinking after trying some slower powders that maybe with the lighter bullet the gun would like a little faster burning powder. I'll give some H4350 a try.

Dave


Steve Timm turned me onto the 120 grain H4350 load when I built my .280AI.

I am running 61.0 grains (Near Max. so work up to it slowly) of H4350 with the 120 grain Nosler BT, Federal 215 primers, and fireformed RP brass. I get 3323 fps out of a 23 inch barrel and sub 1/2 inch groups.

The 120 Bt flat lays deer out.


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Originally Posted by 257
Originally Posted by BobinNH
Originally Posted by 257
Come on, The 280 AI and the 7 Rm are both great....


Yeah, I think we established that.We were discussing which one was faster.... wink


Dont know why your trying to figure out which one is faster. The 7RM is faster. If you stay with safe loads(the same pressure) The 7Rm is faster. It has more case capacity!! DUHHHH!!


There is no replacement for displacement...

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Originally Posted by 257
Originally Posted by BobinNH
Originally Posted by 257
Come on, The 280 AI and the 7 Rm are both great....


Yeah, I think we established that.We were discussing which one was faster.... wink


Dont know why your trying to figure out which one is faster. The 7RM is faster. If you stay with safe loads(the same pressure) The 7Rm is faster. It has more case capacity!! DUHHHH!!


Bob, you just can't make some of this stuff up! grin


Anybody who seriously concerns themselves with the adequacy of a Big 7mm for anything we hunt here short of brown bear, is a dufus. They are mostly making shidt up. Crunch! Nite-nite!

Stolen from an erudite CF member.
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