Home Forums Hunting & Shooting Hunting Rifles .284 win. from 7-08rem[rechambering].

Hello members. Why couldn't a 7-08 be rechambered to a .284? I have been looking for a .284,very hard to come by.Has this been done by any of you? Pros/cons?Thanks,Scott

I can't see a problem with your idea anywhere. I just built a .25-284 (.284 case necked to .25) on a shot out .22-250. It shoots good and feeds well. The only problem you run into with the .284 is seating depth. If you want to shoot over 120 grain bullets, they must be seated deep into the powder capacity of the case to fit into the magazine box. Other than that, it is a great round. Flinch

Flinch, what action did you build yoor 25-284 on? I've been considering something along those lines. I hear the Rem 700 short action is a bit short for the 25-284. I suppose if you are shooting varmint weight bullets it would be OK.

Flinch , thankyou for the reply. I guess it's time to find a short action model 70 in 7-08.Or maybe I can wait for Remington's model 7 in the 7mm Remington SA Ultra Mag,I just read about in NE Game&Fish!Scott

Some of the Winchester M70 short actions provide a COAL of 3.1" which would go a long way to help with seating depth problems in the .284. A short throat could be addressed when you had it rechambered. There are short action M70s available in 7-08. I had a Browning A-Bolt Micro Medallion in .284, 20" barrel, shorter length of pull. I had a hard time getting any spitzer bullets to seat well to the 2.8" limitation of the magazine. The throat would allow longer but you couldn't put them in the magazine unless you seated past the ogive. Speer Grand Slams, Mag Tip and Swift A-Frames loaded OK. I sold it and got a Weatherby Mark V Lightweight Synthetic in .280 Rem which I had rechambered to .280 Rem A I.

Sure it can be done, would be a definite upgrade. Depends on what action you have. Some of them are to short for the 284 and you must seat your bullets very deep.

Jackfish&Hunter, I guess the COAL of .284 win.& magazine /clip length has been a real bugaboo since the start with this cart..I definitely want to shoot 150&160 gr. bullets.140's & under would be well served by the 7-08,itself a fine round. Jackfish, I almost bought a composite stocked Browning bolt last year at a gun show. I'm now glad I passed on that one.Win. Classic Compact does it for me, shorter l.o.p. like your Browning had. I need that when deer hunting with the heavy winter wool. Owned a .284 win. M100,what a jammer!

You are not gaining anything with this conversion. If you want more than a 7/08 go the next step up,a 280 or 7 mag. Short action cartridges are wonderfully efficient. They ain`t ballistic miracles.

4pwr, I hear you. Some load data shows a vel. gain for .284, some shows little or none. I am hoping for 150-200 fps w/.284 w/160's.I already have .280 MR7&7mag. Sako.I want alittle rifle in.284 for the Maine woods. Just something about a.284 makes me want one. Scott

I know exactly what you mean. The craving for a particular rifle or cartridge is not to be denied. If your heart is set on a 284,make it sing and get one.

My brother recently had his Model 7 rechambered from 7-08 to .284. We've only taken it to the range once since he got it back just to fool around with it. We didn't have a lot of time/ammo to sight iit in properly so I'm unsure of the accuracy. Quick ans handy little package though. I'd say, give it a try.

Blkhawk73,I think I will give it a try.I was at K.T.P.in Maine today looking at the M7's & M70short actions.Prices are up there for new,hope to find used.Did your brother's gun feed ok? That's a nagging concern of mine.<BR>Scott

Hi 2503000!!<P>Sorry I am late on this discussion. I just got back from a month in Mt. <P> The 284 is a favorite of mine. I have two. The older rifle is a Ruger M77 which was originally chambered for 6mm Remington. This short action did not need any additional work to get the 284 brass to feed. The second rifle an Interarms Mark X, also feeds just fine. As for the magazine fit, the Ruger is a bit short, but an OAL of approx. 2.870" will fit. The Mark X is a long action and I can seat as needed. FYI the mark X was a 7-08, and the difference in performance was HUGE! <P> Now to some more details. I have to disagree with most reloading books. They are loading to a low pressure level. I suppose this is because the old Savage M99 was one of the first to be chambered for this wonderful round. The truth must be shared! <P> I have had three barrels on the Ruger and all shot the 140 gr sierra or ballistic tips easily over 3000 fps. The old standard load was 57 grs of IMR 4350 with CCI 200 primers. As of late I have discovered the extreme line of Hodgen powders. H4350 in my opinion. is the very best choice for this round. <P> There are differences with these two rifles. I had different smiths chamber them. The Ruger has a fairly short jump to the rifling and it worked out well with the shorter magazine. I am using a moly coated 140 ballistic tip, Fed 210 M, with 59 grs of H4350 for a velocity of 3150. I am not saying a rifle that you put together will do the same, but it gives you an idea of the potential. <BR> The Mark X has a longer jump to the rifling and long seated bullets work great.I also moly coat the bullets. I am using Win 760 in it right now, but will switch when it is gone. Win 760 fits better than the extruded powder, being a ball powder, but it seems to be temp sensitive. The corrent load: a 120 ballistic tip with 62 grains of win 760, fed 210 m primers. The 120 is quite speedy at 3475. Again this is with my rifle with careful loading and chronographing. This is one heck of a jack rabbit and coyote long range wacker! Just cannot use it above 85 degrees.<P> I could go on for quite while on this topic.<BR>E-mail me if you like, I can give you much more.... ross_leggetthotmail.com <P> I do have an idea that might help you use a 160 gr bullet. If I remember you said you wanted it for the maine woods? If so I would imagine that long shots over 300 yds probably won't be taken? Do what I did, either use the grand slams or the mag tips. They are blunter, which shortens them up and put the ogive closer to the rifling. You can even file off the tips on partitions. Nosler does this with the protected tips in 30 cal. Nosler did tell me to be sure and leave a tiny bit of lead in front of the jacket to aid in proper expansion.<P> Don't give up on this chambering, I think you will like it.--Ross

Ross,a most encouraging reply,thankyou.You have worked w/284 Win.considerably.I have not found a Win.70 to chamber yet but when I do will probably e-mail you about those heavy bullets.I won't give up on this project. Scott

It takes a 200 fps increase to extend the point blank range by 25 yards. You can confirm this on any of the ballistic programs. How much gain in velocity do you expect? How many yards is that? Have you answered your own question yet? Deep seating of the bullet ain't as big a bug-a-boo as it's made out to be. A 4% loss in capacity will only result in a 1% loss of velocity. Is the result worth the trouble, now? [img]images/icons/cool.gif" border="0[/img]

Slamfire,thanks for the reply.To answer your ?'s. 200fps,25?,yes and yes.Sooooo,I guess you're on the con side of this.<BR>Scott