I have a Rem Model 7 in 7-08 with a factory 22" barrel (special run)....would rechambering it to 284 win add enough velocity to be worth the expense????

Not only would you need to rechamber it, you would need to do some work to get it to feed properly (fatter than the 7-08)....if you want to pick up some speed take a look at going to the
7-08 Ackley Improved.

I have a thing about that 284 case. There is as much difference in a 7-08 case and 284 case as there is a 308 case vs 30-06. - and that should be worth close to 200 fps for any bullet weight selected. Some 284 handload data is kind of reserved since the 284 was also chambered in lever acitons. You should be able to drive (24") a 150 gr 284 to 3050 fps and 140 gr to 3200. 160 gr can be pushed close to 3000. In my mind, which is certainly subject to criticism - and will be - the 284 is the ideal 7mm chambering. The short model 7 action will also work just fine. I know in the 25-284 I have 120 gr bullets are seated relatively deep but it does not impact load selection or accuracy.

With repect to feeding problems the 25-284 I have was a 257 Roberts in a Rem 722 - same short action as Model 7 - only change made was to the chamber - cartidges feed fine.

With decent bullets, I don't think the animals will ever know the difference. Another consideration is the relative difficulty of obtaining .284 brass and the rarity of factory loads. I wouldn't do it, but it is your toy.

The most popular caliber, by far, that Ultralight Arms sells in their custom rifles is the 284 Winchester. Also Norma and Hornady are now manufacturing 6.5-284 brass. There are also numerous other wildcats out there based on the 284 case - brass will be around a long time. Factory loads?

Rifleman, the 722 was originally chambered for the .257 Roberts, which is a 7X57 case necked down to .257. The .284 is a rebatted case and the dimensions are much different, .500" just ahead of the rim versus .467 on the Roberts, the shoulder is .475" versus .423". I have rarely heard of a .284 being chambered where there wasn't some feeding problems but it does happen. I do agree that it would be a great round in this action. I have one I have been building on a Mexican 1910 mauser. Havent got tot he point of shooting it yet. Some day.

You are right about the brass, it is readily availbable and will be for some time from what I have heard.

Chic

[ 08-24-2002, 03:54: Message edited by: Customstox ]

I've got a 25-284 on a Rem 600,another on a short action 700 and I recently punched out a S/S 700 BDL(24") in 7-08,to 284Win. Two friends have 25-284's built on Model Sevens also.

None required feeding mods. All are ultra reliable......................

How bout 7-08 Improved? I am not sure about the Model 7 mag length, but you might have trouble with heavier bullets.

The Model Seven,700 short(ADL/BDL),600 and 660's all share a like magazine box length(2.800"-ish).

Mag box constraints are a lessr concern with the 7-08/7-08Ackley,due to it being a shorter case,than the 284. In my opinion,the 284 in a magazine of that length,is relegated to 140's and less(projectile weight). A 140XLC in the 284Win,at 2.800",is starting to scrunch things up. I dote on the 120XBT and V-Max of the same weight,so length constraints do not plague me,in that chambering. For those preferring a heavier projectile,the 7-08 or it's AI version,is a better fit,without magazine length alteration..............

There is an excellent article about the .284 in the June 2002 issue of Handloader. The article titled "Classic .284 Winchester," written by Trzoniec, has all the details you want, including handloads for it. I don't think is much faster than the .7-08.

Mr. Trzoniec used a .30-06 (long action) to build his rifle, and according to the article, there is no need of bolt modifications if you use a .30-06. He also explains where and what brass to buy, and how to fire-form it.

first point

284 WIN is a nice case / caliber but if you need to stay in your REM7 mag lenght , bullet over 140 gr must to be seat very deep ( same problem in 6.5 Rem Mag in 660 )but with 140 gr as BT from Nosler or new very best SWIFT Sirocco .

second point : CAUTION WIN 284 from Winchester and 6.5/284 from NORMA and Lapua have not the same base diameter , NORMA and Lapua are bigger in diameter so a chamber cut in 284 WIN with regular reamer doesnt accept 6.5/284 brass .

7.08 Ackley is perhaps a more easy way to get more fps .

Good shooting

DAN TEC

Mark, stick with it in 7-08. I did one of those in 284,a year or so ago on a Mod 7. Problem is with 140gr Nosler BT's, will have to seat past the ojive to fit in the magazine length of 2.820. I haven't tried the Partitions, but the Speer Grand Slam will work but have to be seated deep also. These were the only two bullets I had on hand at the time. The throat on a standard 284 reamer is long also. I have since rechamberd that gun to a 7mm Ultra Short. Had to open the bolt face and install a Sako type extractor and added new Wyatts magazine box for single column feeding.

If I were to do it again in 284, I'd use a short action and add a Wyatts magazine box for the Rem short action so bullets could be seated longer.

Al -

quote:

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I'd use a short action and add a Wyatts magazine box for the Rem short action so bullets could be seated longer

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Where do you find the Wyatts box? How much longer?

Thanx,

R-WEST

[ 08-24-2002, 18:23: Message edited by: R-WEST ]

R-West, mine come from Brownells. For the mod 7, there will be no difference in length.The catalog says adds .110 for the short box. pg 157 of the new Brownells catalog.

Mark,

Re-chamber one of your 7-08's........heresy!!

Besides, I thought you were saving for your next African hunt??

Bob

I built a 284 on a Rem 600 action. I used a lengthened magazine box, and opened up the feed ramp just a tiny amount. This allows me to load my 284 rounds to 3.1", which makes a big differance ballistically. I may have a fast barrel though, so i'm not sure the data is valid. I get 2900 fps with Win factory 150 gr PP's. It has a 23" light taper barrel (basically I built it as a goat gun). The only feeding problems I've had were with reloads (partially resized). Factory ammo feeds fine. After fiddling with my reloading procedures a little, it works OK. Compared to my 7mm-08, I've gained 200 fps. If you like the Model 7, I say go for it. - Dan

NO! dont do it. hornady light mags in 7-08 will come very close to what you will end up with.
i did on a 7 just like yours. what a dissapointment. rails, ramp re-chamber. cant put anything over 130's without crowding the charge and sinking the bullet to deep.
i sold mine as soon as i got it to shoot. if you have to have a 284 then buy a med length action and have at it. if your just looking for a boost, try the hornady lights.
you will kill the resale value of your gun also if you cant find someone who feels the same about a 284.
save the tylenol and just shoot your 7-08.
adios
woofer

I have a Weatherby Vanguard short action that has rebarreled to 284 with a 23" stainless RKS barrel.Mag box has been lengthened to 3.08" and it feeds fine.I haven't chronyed it yet but a fellow I know has a 284 on a M70 at 23" and he's getting 3050 with the 139 Hornady.Mine is For Sale,by the way.I'm getting a 7-08 AI built.

I agree with Tom Holland - the .284 is great, but I would not change the 7mm/08!!

Hey rifleman, I agree, I shoot 2 284's and that is about what I have been getting in a 24' Ultra light rifle rechambered from 7mm-08. The other is a 22" Medallion A-bolt. What reloading info do you have on the 284. Dave

I think the conversion would work ok but cartridges would have to be loaded to fit in the existing mag box. This unless you want to go tothe extra expence of lengthening the box and cutout in the receiver.
By the way, a standard chamber will accept all brass.The problem arises with Norma brass only if the gunsmith was foolish enough to special order a reamer to allow minimal expansion with Winchester brass.
I really don't think the gain is worth the pain but it is ultimately th owner's choice! Regards, Bill.

easist change would be to
7x57 ACKLEY
No feeding issues, not real work, should be a setback and rechamber.. 125 bucks.. and you'll get 284 or close

jeffe

[ 12-05-2002, 22:09: Message edited by: jeffeosso ]

In a model 7 action, you would need to have the bullets seated deep to have the loaded cartridge fit in the magazine. This would negate all the advantage of the 284 in that rifle. Going with a 7-08 Ackley would be a better idea. The 284 cartridge really shines when it is necked down to 6.5 and used in a long action so the bullets can be seatec out and you can take full advantage of the boiler room available.