284 Winchester

[woodchopper]

alright I need a little schooling on this one.

284 Winchester, looks like a nice little compromise sitting between 7-08 and 7mmRM, case is a little like 7.5x55 but has the rebated rim.

might be a nice little project, and a use for a Ross rifle receiver

So comments??

 

[MiG25]

I always wanted a 284.

 

[woodchopper]

Ok I did some thinking and measuring and while the 284 Winchester would make a good rifle I am thinking that I might try something a little more radical

The bolt face I'm working with on the Ross is .540" the 284 is only .470". So I'm thinking that if I use 7mmRM cases with the belt turned off and shorten them to about the length of a 303 case I should have something similar to the 280 ross in case capacity. Might even swage the cases down a little to make them more like the 284 Win with a base diameter of .500 rather then .512" The rim on the 7mmRM is a lot closer the 303 bolt face, end up with something like a 284 semi-rimmed.

 

[dan belisle]

I like the 284, I've had a couple of them (still have one i built on a Rem 600 for chasing goats). but for that Ross I think your rimless 7 rm idea has a lot of merit. will fit the action better, and give you a very useful cartridge to boot. - dan

 

[woodchopper]

I like the 284, I've had a couple of them (still have one i built on a Rem 600 for chasing goats). but for that Ross I think your rimless 7 rm idea has a lot of merit. will fit the action better, and give you a very useful cartridge to boot. - dan

might have to dust off the Ross M10 sporter in 280 Ross again too if I'm going to be messing around turning down the belts on 7RM, but then there is the issue of finding appropriate sized bullets, and borrowing some forming dies

The one I'm looking at for this project is a 1905R Ross commercial sporter with a burnt out barrel, well 2 burnt out barrels the second one was a cut down military that is in worse shape then the commercial barrel. The did come in 280Ross as well as 303 and 35WCF so I think its fairly safe to work with.

 

[MiG25]

A .540" boltface sounds a lot like a WSM etc.

Or you could base it on the 375 Flanged Magnum brass (I see Norma available), with the rims turned down a bit.

 

[yodave]

.540 bolt face would be better suited to a 7mm-300WSM, just a step up above the .284 and messing with brass and rims and belts could be completely eliminated. 7mm WSM brass is impossible to find, and when you find it, stupid expensive, but necking down 300 WSM mag brass is a cheap alternative and gives up nothing to the other full case.

I still think you should just cut down 303 british brass and run it into a 35 remington full length die and make a rimmed 35 remington, cheap dies, lower pressures and just plain cool

 

[yodave]

a list of donor brass for you.............

Long actions with a bolt face .Dia of .540 +/-
257 Weatherby
264 Win Mag
270 weatherby Mag
7mm Remington Mag
7mm Weatherby Mag
7 STW
7mm Remington Ultra Mag
300 H & H
300 Winchester Mag
300 Weatherby Mag
300 RUM
303 Brit
8mm Remington Mag
338 Winchester Mag
340 Weatherby Mag
338 RUM
375 H & H
375 Weatherby
375 RUM
416 Remington Mag
458 Winchester Mag
458 Lott

 

[nowarningshot]

Didn't Epps experiment with a lot of smaller bores on his 303 Epps improved case?

 

[dan belisle]

Didn't Epps experiment with a lot of smaller bores on his 303 Epps improved case?

Yes. I've had a 25-303 and 243-303 Epps over the years. He also built them in pretty much every common bore size at the time. - dan

 

[450yukon]

Sounds like a 7WSM. No belt to cut.

 

[dan belisle]

Sounds like a 7WSM. No belt to cut.

But almost as difficult to get brass for as the 280 Ross. As previously mentioned, the 7mm-300 WSM will give you the advantages of the cartridge without the brass issues. - dan

 

[woodchopper]

well I do have a 325WSM, but I'm not going to reform any of that brass, it was hard enough to find.

I have time to contemplate where I want to go with this one, I will then have to source a barrel

 

[dan belisle]

well I do have a 325WSM, but I'm not going to reform any of that brass, it was hard enough to find.

I have time to contemplate where I want to go with this one, I will then have to source a barrel

At least if you base your wildcat on 7 RM brass, its cheap and easy to find. - dan

 

[woodchopper]

At least if you base your wildcat on 7 RM brass, its cheap and easy to find. - dan

yup I got lots of it already, have a Ruger M77 in 7mmRM so I do have a bunch of brass kicking around

 

[Ax.338]

The one I'm looking at for this project is a 1905R Ross commercial sporter with a burnt out barrel, well 2 burnt out barrels the second one was a cut down military that is in worse shape then the commercial barrel. The did come in 280Ross as well as 303 and 35WCF so I think its fairly safe to work with.

I`d be sticking to .303-35WCF pressures for this one.

The 1905 actions that were in 280 Ross were not the same as what you are working with. They were actually 1907 actions, still marked 1905, but with a serrated bolt-head similar to the M-10.

 

[b72471]

If you decide the 7WSM will work for you it can be loaded down to 284W velocities.
No available brass, never been a problem I use 270WSM brass, once through die and you're ready to go.
expanding the neck from .277 to .284= .007, it does not cause any doughnut in neck as some may claim.
Anyway enjoy.

 

[Ruger007]

well I do have a 325WSM, but I'm not going to reform any of that brass, it was hard enough to find.

I have time to contemplate where I want to go with this one, I will then have to source a barrel

Funny I have seen a bunch of new brass lately.