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Neck up 243 or Neck down 7mm-08 for 260win brass

cypriss32

L337
Supporter
Full Member
Minuteman
Aug 27, 2004
2,512
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Fresno, Ca
Looking to stick with win brass dunno why..... Would you recomend necking up 243 or necking down 7mm-08? Never had to form brass before.
 
Re: Neck up 243 or Neck down 7mm-08 for 260win brass

Neck down 7mm-08 brass. This helps so you won't have a crease or donut where the shoulder used to be on the 243, that is now part of the neck on the 260. But, I have seen people go both ways.
 
Re: Neck up 243 or Neck down 7mm-08 for 260win brass

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ChadTRG42</div><div class="ubbcode-body">I have seen people go both ways. </div></div>

Seems to be common these days!
 
Re: Neck up 243 or Neck down 7mm-08 for 260win brass

7-08 dude




Do you think he meant "arrogant"?

I wonder what we are wanting to be?
 
Re: Neck up 243 or Neck down 7mm-08 for 260win brass

read an aricle on 6mmbr.com that said its better to neck down, and neck turn to unform the neck and custom fit it to the chamber.
 
Re: Neck up 243 or Neck down 7mm-08 for 260win brass

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Captain Kick-Ass</div><div class="ubbcode-body">




Do you think he meant "arrogant"?

I wonder what we are wanting to be?
</div></div>

Beats me, I would try to ask him, but I dont waste my breath on the likes of him. I already gave him a piece of my mind.
 
Re: Neck up 243 or Neck down 7mm-08 for 260win brass

I don't think it makes as much difference unless you're using a tight neck chamber. All my chambers are SAAMI spec'd, I use both .243 and 7-08, and haven't really seen any issues I might attribute to dounts. If donuts were an issue, I'd stick with 7-08.

Greg
 
Re: Neck up 243 or Neck down 7mm-08 for 260win brass

I neck down 7mm/08 as well, a couple of things to consider though, when necking down with a Redding FL sizing die WITH bushing you will not get the complete neck sized to the shoulder it will leave a slight bulge near the shoulder,(may or may not cause a problem but could cause a headspace issue ) therefore, for the first neck down you should use a FL die with no bushing,or better yet a custom honed FL die to meet your O.D. specs you want for your neck.

I personally like Remington Brass, except for the fact of getting loose primer pockets too quick, I usually end up throwing it away when i feel no bite when seating primers with the hand tool.
 
Re: Neck up 243 or Neck down 7mm-08 for 260win brass

I would think that any headspacing problems associated with only sizing the neck partway would be minor. Expansion and springback during/after firing will rarely result in a casing which will not chamber. If it does, that's usually an indication that the case is highly work-hardened and nearing either its end of usefulness, or at least coming due for annealing. If it will chamber before sizing, it's even less likely that it won't afterward.

Greg