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Forum Index > Rifles general discussion > Necking up 6.5 x 284 brass to 284 win??

Necking up 6.5 x 284 brass to 284 win??

18 Jul 2014
@ 08:28 pm (GMT)

pete clarkson

Hi
I'm going to get a Remington 700 Mtn LSS in 7mm-08 rechambered to .284 Win and will be having an extended Wyatt's CF box fitted to suit.
Have had several 284 rifles in past years and used Winchester brass (some of which was crudely formed)
Now have some new Norma 6.5 x 284 brass on lay-by but my Forster dies do not have a tapered expander ball so are not suitable for necking up.
I do have a Lee universal decapper and was thinking that if I swapped the decapping rod for the decapping rod from a Lee 7mm-08 FL die maybe this would work as it has a tapered expander.
Anyone have any thoughts on this?? Dont want to bugger even one case experimenting as they are like gold and I'm on a real tight budget here.
Thanks in advance
Pete

Replies

19 Jul 2014
@ 04:58 pm (GMT)

Nathan Foster

Re: Necking up 6.5 x 284 brass to 284 win??
I Pete, the decapper will have a single diameter stem after the bump up- not the best. I would not do it. What you need is an oval shaped button. A Hornady die would be better for this first operation. Do you know anyone with a Hornady 7mm Rem Mag / WSM die?
19 Jul 2014
@ 06:47 pm (GMT)

pete clarkson

Re: Necking up 6.5 x 284 brass to 284 win??
Hi Nathan, the Lee decapping stem from the 7mm-08 die I have here has a long tapered expander ball that should work in theory, but I was worried about alignment as the case would be centered, more or less, in the decapper die but would have no side support if you know what I mean.
I really cant afford a Hornady die although I realise that would be the best solution. Thanks for your reply
19 Jul 2014
@ 07:36 pm (GMT)

Nathan Foster

Re: Necking up 6.5 x 284 brass to 284 win??
You will have quite poor alignment / runout no matter which dies you use. To correct this, fire form cases with Trail Boss powder. Fill to 90-100% capacity, use a cheap bullet. Velocities will be around 1500fps or so. This will fireform your cases without stress to the brass or barrel wear. Trail Boss is an extremely useful powder to have on hand.
19 Jul 2014
@ 10:48 pm (GMT)

pete clarkson

Re: Necking up 6.5 x 284 brass to 284 win??
Aha ...great idea thanks, I have some Trail Boss here and some 7mm hard cast projectiles...much appreciated
21 Jul 2017
@ 10:15 pm (GMT)

mark suckling

Re: Necking up 6.5 x 284 brass to 284 win??
Hi Pete,
How did you go with your necking up procedure? I am getting a .284 win shortly, sounds like winchester .284 brass is very hard to get.(which I knew) wild cat necking up etc is all new to me.

I havent purchased dies yet. I take from Nathans comment a hornady .284 win die set would be best with the oval expander.

However I do have a lee collet neck sizing die mandrel for 7mm rem mag that I polished down to tighten neck of the rem mag then I purchased an undersize mandrel for it so the original one is just lying around, I wondered if I polished it down some more at the base if it could become a tapered expander of sort...silly idea?

Then could I follow up with a basic lee FL die & fireform as Nathan described.



28 Jul 2017
@ 05:00 pm (GMT)

mark whiteley

Re: Necking up 6.5 x 284 brass to 284 win??
Pete I understand you are on a tight budget but you also don't want to be making mistakes so why not use the gear for doing the job, this is the gear I use a 21st century expander die $45 and a 21st century tin expander mandrel $29
http://brtshooterssupply.com.au/products/21st-century-expander-die.html
I know this procedure can be done with FL sizing dies but if you don't want to be experimenting and loosing exy brass,
you are not buying budget brass, 6.5x284 cases are very expensive, I pay $185 for 100 lapua cases, not cheap
the problems you will encounter necking up is one side of the neck thinning out more than the other, maybe do-nuts because you are sizing into the thicker shoulder, uneven case mouths, shorter cases and woeful concentricity
I usually anneal before firing as well, being new brass it may not be as necessary as fired but I do it, no shortcuts
anyway just a thought and good luck with it
regards Mark



28 Jul 2017
@ 06:29 pm (GMT)

mark suckling

Re: Necking up 6.5 x 284 brass to 284 win??
Sorry Mark, I picked up on an old thread regarding this topic. Pete may not be following this.

I found some Bertram brass in .284 win, I'm going to give that a try, I have read reviews from F class shooters in Australia that reckon it's ok, slightly smaller internal volume and slightly larger range in weight than lapua 6.5 284 brass. Otherwise very good.

Much the same price. See how goes.
29 Jul 2017
@ 03:49 am (GMT)

Bryan Webster

Re: Necking up 6.5 x 284 brass to 284 win??
Quote:
Sorry Mark, I picked up on an old thread regarding this topic. Pete may not be following this.

I found some Bertram brass in .284 win, I'm going to give that a try, I have read reviews from F class shooters in Australia that reckon it's ok, slightly smaller internal volume and slightly larger range in weight than lapua 6.5 284 brass. Otherwise very good.

Much the same price. See how goes.


Mark's method is what I have been using. Worked well for me.
29 Jul 2017
@ 11:04 am (GMT)

mark suckling

Re: Necking up 6.5 x 284 brass to 284 win??
Thanks Bryan, my Bertram brass just turned up, looks good necks straight and case mouths round by eyeball. Looking forward to loading them up.

Seems to be a lot of buzz about reloader 17 for high velocities from this cartridge but it's hard to get. Is it worth the trouble to find?

I shoot 6.5x55 too so already have a couple suitable powders to try. Will start with them anyway.
30 Jul 2017
@ 03:25 am (GMT)

Bryan Webster

Re: Necking up 6.5 x 284 brass to 284 win??
Out at our local gun range last summer, a fellow was doing a load workup for the 6.5x284. I did not see what brass he used, however I watched his 200 yard groups for him and when he finally got the load he wanted, it was a 0.36 inch five shot group. He had shot two such groups. I have no recollection of the load he used but I did write down in my iPhone that it was shot with 4831SC powder.

One thing I recall was that he was using a Hornady Hydraulic die to form his brass, but we never spoke about what he may have had to do to it after forming to make it perform.

I have not tried Reloader 17 but you may wish to check out how sensitive it may be to powder temperatures like others like Reloader 15 is.
30 Jul 2017
@ 06:26 am (GMT)

Bryan Webster

Re: Necking up 6.5 x 284 brass to 284 win??
As well as the above approaches, 6.5x284 brass is available from Lapua, Hornady and perhaps others as well.

Here is an article to read:

http://www.accurateshooter.com/cartridge-guides/65x284/

30 Jul 2017
@ 11:53 am (GMT)

mark suckling

Re: Necking up 6.5 x 284 brass to 284 win??
Thanks Bryan, I have a can of 4831sc will give that a try first.

Cheers for the article.

Mark
30 Jul 2017
@ 06:31 pm (GMT)

mark whiteley

Re: Necking up 6.5 x 284 brass to 284 win??
I am not sure what would be the best powder to try in your 284 Mark but My 6.5x284 like's both adi 2209 and 2213sc
My rifle was built to hammer fallow at distance and it does easy but could be used in an f class match, even if it is built on an old mauser action LOL
this is what it does consecutively at 120 yds with 2213sc, 142 smk's at around 2800fps, a bit slow I know but accurate




good luck with it anyway
regards Mark





 

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