Neck bushing size for 260Rem with RP brass??

One-Eyed Jack

Gunny Sergeant
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Minuteman
Nov 29, 2004
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Minden, NV
I'm not at home but need to order a Redding neck bushing for 260Rem when using Remington brass. Does anyone know the diameter of the round at the neck (2 x brass thickness + 0.264")? Thanks!
 
Re: Neck bushing size for 260Rem with RP brass??

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Chiller</div><div class="ubbcode-body">Think I have been running a .286 with my neck tension. </div></div>

I reloaded for buddy using RP brass, cycling 200 pieces to the tune of roughly 600 loaded rounds and I used .290" TiNi bushing, although he did get the .289" bushing as well. About .002" of neck tension IIRC.

Surgeon/Rock/AICS rifle that shot pretty well with the 140 AMAX and 142 SMKs over 40.5-41.7grs of AA-4350.

Chris
 
Re: Neck bushing size for 260Rem with RP brass??

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Chiller</div><div class="ubbcode-body">hom much neck tension is the "go to" number? </div></div>

In a bolt gun, about .001"-.003", with .002" seemingly meeting the needs of many here, who reload for bolt guns. Unless you're turning your necks (not needed in factory chambers and reaming the inside of your necks) you'll get variations in neck tension, so .002" is a decent compromise. With .001" of neck tension, you can 'almost' twist the bullet out with your fingers, from my experience.

For gas guns, it seems to be between .003" and .005", with .004" being the compromise to keep bullets seated and not allowing for much, if any, bullet set back.

My 223 Redding neck sizing die put's about .004"-.0045" of tension and I get no appreciable set back after chambering a loaded round three times.

Chris
 
Re: Neck bushing size for 260Rem with RP brass??

There was a post a bit ago I asked the same question and was told an average Rem brass loaded round measured .291 . Wouldn't that imply a neck tension of .002 would require the .289 bushing??
 
Re: Neck bushing size for 260Rem with RP brass??

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Swan</div><div class="ubbcode-body">There was a post a bit ago I asked the same question and was told an average Rem brass loaded round measured .291 . Wouldn't that imply a neck tension of .002 would require the .289 bushing??

</div></div>

Even though we measure neck tension in .001"s of an inch, it's kind of an imprecise endeavor due to neck walls being all over the map. It's not unusual to measure a single case in three different locations around the neck (4:00, 8:00 and 12:00) and get three different measurements. This will effect neck tension.

You will also have variations within a batch of cases, so we're kind of guestimating things. Add to this spring back and well...all bets are off. If you have softer necks, you may get .001" of spring back, work hardened necks and no spring back.

I only reloaded RP brass and while it's not a bad case, it's no Lapua, Nosler or Norma, either. Get the .289" and .290" TiNi bushings and your bases are covered for RP cases, is my thought on the matter.

Chris
 
Re: Neck bushing size for 260Rem with RP brass??

I will piggy back of the question here and ask something as well about Redding dies for the 260, i have the 40-50 dollar seater and neck sizer set. Its not the fancy ones, no micrometer or anything like that. Its part # 82531, my question is do i need the bushing for the neck sizer, i have looked at Reddings site and cant quite make out if i do or not. I know their Type S dies you do, but with these im not sure. Thanks for the help
 
Re: Neck bushing size for 260Rem with RP brass??

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: deadly0311</div><div class="ubbcode-body">I will piggy back of the question here and ask something as well about Redding dies for the 260, i have the 40-50 dollar seater and neck sizer set. Its not the fancy ones, no micrometer or anything like that. Its part # 82531, my question is do i need the bushing for the neck sizer, i have looked at Reddings site and cant quite make out if i do or not. I know their Type S dies you do, but with these im not sure. Thanks for the help </div></div>

You can certainly load accurate and consistent ammo with a generic/standard seating die and a non-bushing sizing die, be the latter a neck only (body die will be needed for shoulder bumps) or a F/L die.

We like bushing dies because we can put a lighter amount of tension on a bullet vs. factory neck/FL dies, which really have to err on the side of caution and put more neck tension on the bullet for liability reasons and just to accommodate the lowest common denominator in various brands of brass out there.

Redding S/Bushing dies come in two flavors: Neck only and F/L sizing, which uses a bushing on the neck, but also sizes the body back down and bumps the shoulder back.

You can have standard non-S/Bushing dies, in Neck only and F/L sizing, but as I said above, they'll put a generally tighter pinch on the necks and close them up more than might be needed.

As for the competition seaters, I use one Redding, one Forster and then I have two micro seating stems for my 4-5 Hornady seating dies that I use and I like them all. They give one really fine adjustments, instead of using a box wrench with the coarse bolts.

Hope this helps, Chris