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280 Ack/284 Win/7x57 Ack/260 AI/25-06 AI

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Unread 10-13-2005, 11:12 AM
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Join Date: Jul 2005
Location: East TX
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280 Ack/284 Win/7x57 Ack/260 AI/25-06 AI

Does anyone have information they could offer and/or advice on the listed calibers?

I am thinking of having Pac-Nor "build" a rifle in one of the listed calibers to use for paper plinking and hunting deer/pigs/varmints out to maximum about 600 yards. I have a 25-06, and I don't think an AI chamber would offer much more than a burning more powder than my current loads. I would also not have to worry about accidently picking up the wrong lots of brass.

The gun would have a 25-28" super match barrel with a #6-7 contour. I would focus on shooting the larger AMAX/SMK/Wildcats in the given caliber. No muzzle break needed as they would all be docile on the bags. Thanks!

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Unread 10-13-2005, 01:11 PM
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Join Date: Dec 2001
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Re: 280 Ack/284 Win/7x57 Ack/260 AI/25-06 AI

I had a 7x57AI and it got right up there in velocity with a 7mag and used appr 10grs of powder less. I'm now shooting a 284 on a rem action. Everyone had their favorite caliber and anyone of the calibers you mention plus some others would work. To me your spreading out too many bullets calibers to make a good judgement call you don't mention what action is it long or short? You gave barrel and bullets brand you want to use no bullet weight or barrel twist. I think you need to narrow it down abit when you look at 7mm bullet 280,280AI,7-08AI,7-08,7x57,7x57AI,284,
7x47imp plus others same with the 6.5 bullet good one you didn't mention was the 25 Souper. Well good luck.
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Unread 10-13-2005, 04:34 PM
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Join Date: Nov 2003
Location: DFW Texas
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Re: 280 Ack/284 Win/7x57 Ack/260 AI/25-06 AI


Kirby built me a 280AI and it shoots great. Honest sub .5MOA and averages somewhere in the .3-.4s. Many .25's

But I cannot say this is from the caliber. KIRBY IS AMAZING!!!!!

I am getting 3000fps from the 160gr Accubond and 58.8gr R22. I took it up to 60gr but got some pressure there. It is really the only load I tried for accuracy but I also tried the 140 Accubond and 139gr Interbond at about 3150fps.

I have had 2 other 280AI's and I absolutely love them. My fireform loads shoot well under MOA and full tilt loads are heck on deer and hogs. I do not have the longrange kills like everyone else here does though. My longerst on biggame is 400yds(the buck did a TX 2 Step and went down)

All this to say 280AI gets my vote and I am VERY PARTIAL!!!!

Notice you are in East TX...WHere? I am in Forney TX.

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Unread 10-13-2005, 04:50 PM
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Join Date: Jan 2005
Location: OK
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Re: 280 Ack/284 Win/7x57 Ack/260 AI/25-06 AI

sewwhat89, I recently put a pac-nor #7, 26", in 260AI on a savage action. The barrel is a 3 groove 8 twist. Also added sss trigger, recoil lug, new stock floated and bedded. I wieght sorted rem brass, cleaned up the flash hole, and put together a "genaric" load for fire forming.

139gr lapua scenar over 46gr rel 19 seated .005 into lands.
This load is very mild in my barrel and produces 2750fps.
the 2nd 3rd and forth shot went into 3/8" @ 100 yards.

I have not finished fireforming yet but am very pleased with what the rifle is showing me up to this point.

Two weeks ago I was shooting dirt clods in a picked soybean field out to 725 yards, in a stiff wind. At that distance I could spot my own shots and once windage was corected it was easy to make hits.

I chose this caliber/contour because I was looking for good performance, conservative powder usage, good barrel life, low recoil(without a brake), and quality bullet selection.

I'm not disapointed. With your statment of 600 yard max, you wouldn't be disipointed either.
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Unread 10-13-2005, 05:57 PM
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Join Date: Jul 2005
Location: East TX
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Re: 280 Ack/284 Win/7x57 Ack/260 AI/25-06 AI

Kirby narrowed it down to 6.5-06 AI and 280 AI. I like the ballistics offered by the 6.5, but there are relatively few premium hunting bullets available for that round. Swift finally released a Scirocco, 130 gr, I think. That should be a sweet performer. I just like the idea of being able to shoot bullets bigger than the 142 gr class bullets. I guess its hard to argue with a 140 gr bullet with a .55x bc.

My main concern is barrel life of the 6.5-06 AI. Load data is similar/same as 6.5-284; barrel life about 1.5k for my standards. My brother's 7RM is over 2.5k rounds and will still put 3 140 AB into 1/2 an inch at 100 yards.

Deer well past 600 yards won't be able to tell the difference between the two rounds. It seems to me that they are basically ballistic twins, but 280 AI has more bullet choices and diversity. The bullets for 280 AI are cheaper and easier to come by for me. Decisions, decisions!

btw I'm in Houston.
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Unread 10-13-2005, 10:04 PM
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Re: 280 Ack/284 Win/7x57 Ack/260 AI/25-06 AI


Best way to figure out which to go with....

enie, menie, minie, moe!!!!

Seriously though, you could not go wrong with either choice. For deer out to 400 yards there is no better bullet then the 120 gr Ballistic tip in the 6.5. For longer range the 140 gr A-Max or 142 gr SMK will work perfectly.

Also do not forget the Wildcat Bullets, Richard offers a 142, 150, 160, 165 and 169.5 gr ULD RBBT in 6.5mm. Most of which will make offer higher BCs they your used to seeing in the big 30 and 338 caliber match bullets.

In 7mm you have the great 140 and 160 gr Accubonds which will cover anything out to 500-800 yards in the 280 AI. If you want more reach the 162 A-Max will offer slightly more BC but the 175 gr SMK and 175 gr ULD RBBT Wildcat will offer even more.

There is also the huge 200 gr ULD RBBT but I personally feel this is to much bullet for the 280 class round.

Really, take your pick, both have alot of very strong points and neither have much to complain about.

Kirby Allen(50)
Kirby Allen(50)

Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

Farther, Faster and Flatter then ever before.

Web Page: www.apsrifles.com

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Unread 10-13-2005, 11:36 PM
LB LB is offline
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Join Date: Jul 2004
Location: Upland, CA
Posts: 423
Re: 280 Ack/284 Win/7x57 Ack/260 AI/25-06 AI

Of what you mention in the topic title, and you ask for opinions:

I don't care for either the 260AI or 7X57.

Of the others, I own a 25'06AI and I do not see why it wouldn't handle what you want it to do; mine is perfectly adequate.

The 280AI is a great choice, simply because it is more powerful and therefore, more versatile; with a good selection of bullets.

But. Unless you are just into the idea of a semi-exotic chambering, there is nothing wrong with a straight 284Winchester. In a long action, you can seat heavy bullets way out there, if you plan ahead, and gain a little capacity, as well. It is a cartridge that is not in need of "improving".

Some guys always want something different, and that's understandable, but there is something to be said for a factory chambered cartridge. Me personally, I would be very hesitant in buying a used (nonstandard) cartridge, in the belief that, as with a Weatherby, it's a hot rock and probably has very little life left in the barrel. So, if resale means anything to you, get the plain vanilla 284, it can do anything the others can do.

Good hunting. LB
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