I've got three 308 rifles and would like something different so I'm thinking of re-chambering my Model 7 to a 30-284. How much increase could I expect? Are there usually feeding problems with this conversion?

Ballistic is equivalent to 30.06.
I don't know for Model 7 but you may have one less round in the magazine and the need to file a bit the lips of the magazine to open them to get a better feeding.
HTH

A 30/284 is a wonderful cartridge. Loading manuals tell you to use 30/06 data, but I can say from experiance that it'll do anything and more than a 30/06, and more accurately too.

May have a problem with magazine and the 30x284. Brownells sell an extended magazine box for the model 7 only for the wsm case but may be able to change out follower. Problem your going to have is ejecting a loaded round may have to notch out part of the front receiver.

Not sure if a 20 inch barrel is going to gixe you any increase ,,,tj3006

If you want to stretch the performance of your .308, using High Energy or Light Magnum ammunition would probably get you the same results with a lot less hassle. But if you want something different to play with, go ahead and play!

Kend,

Make up some empty rounds and see if they feed. The 284's I made up fed well from my Kimber but my magazine is too short for my taste.

Unless you can make a long magazine out of it I would not do it.

I have experienced some feeding problems with a .25-284 in my model Seven. The shoulder is pretty wide, so the magazine box needed to be replaced with a window style box and the feed rails had to be widened slightly by the gunsmith so that the last round would feed. With these modifications I am able to fit three in the box. Performance so far has been pretty much equal to a .25-06--100 grain bullet at 3300 fps with a 23 inch tube. I would expect that a .30-284 would easily equal factory .30-06 loads and maybe a bit more depending on barrel length. I certainly would not want less than 22 inches on a gun with that amount of case capacity. Anything shorter than that would probably not offer you the performance you desire. A model Seven can already be had in .300 SAUM, which I know from personal experience to be a very nice cartridge. With the 22" factory barrel velocity is right about halfway between a hot loaded .30-06 and a .300 Winchester Magnum. I pretty easily get 2900 fps with a 180 grain bullet. The model Seven magnum action is also designed to feed those fat cartridges and does so very well. Accuracy from mine has been pretty good too.

I have rechambered a couple rifle to 30-284, but think that a 22" is about the minimum to see a meaningful velocity increase and not too much muzzle flash. The 722 in 300 Savage that I rechambered had a 24" barrel and would go between 100 and 200 fps faster than the 308 with the same bullet in the 150 to 180 grain range. Personally, having BTDT, I wouldn't bother to do it again. The really good 284 wildcats that I've played with are the 25-284, 6.5-284, and 338-284. The 22-284, 30-284, and 35-284 didn't work as well for me.

Jeff

30-284=the 7.5x55 Swiss

Have not shot this in anything but a K31 Swiss rifle with cast bullets. VERY good shooter. I would say if you want to try this caliber to buy a K31 as they are cheaper than a rechamber. I am thinking of a 30-284 project down the road myself.
Jeff

kend
John G is correct. Just use Federal High Energy or Hornady Light Magnum loads. If you need more power than a 308 step up to the 300 Mag.
My model 7 and my Blaser Tracker in 308 are some of my favorite rifles.
If i think I will need to shoot 300 yards + on a hunt I use my 300 Mag.

same sentence as "30-06vs308"

you would "gain" about 100-125 fps (no game can tell 100fps) for about $400 in gunsmithing, and then have an unsalable wildcat.

you DO understand that a remington 700 in 30-06 is all of 3/16 or .1875", or less than about a dozen business cards longer, don't you?

sell the 7, get a 700, and bemiles ahead, as the 7 mag will NOT allow you to actually get any of the additional "magic" that long seated x284 based rounds get

jeffe

Thought about doing the 30-284 in a 308 in an old J-series Savage with short mag box(2.8in.). You'll probably find (I did) that 180 grainers and heavier spitzer bullets will be seated deeply, ogive below the case mouth. Looks kinda funny.

If you really want more performance, why not go with a 300 WSM? I can't see putting the money into a re-chamber, new dies and brass unless I'm gaining at least 200-300 fps over the parent chambering.