6mmBR neck bushings
- Thread starter stubblejumper
- Start date
thunderstruck
Regular
- Location
- Northern B.C.
Why squish your expensive brass down every firing when you can squish just a small portion of the neck while leaving the rest of the case formed to your chamber?
Less stress on the brass overall (bump shoulder every 2-3 firings) and super accurate ammo. The less you do to the fired brass the better, and more consistent it will be.
paperslayer
Regular
- Location
- Chilliwack
measure your brass with a seated bullet and then go with a bushing that is 2 thou smaller. i suggest the titanium nitride bushings since there is no need to lube.
Neck tension is even more critical for reloaders that neck turn also.
6mm Shooter
CGN Regular
- Location
- White City, SK
Do you have new blue box brass or old gold box?
Neck sizing dies of the bushing style, work OK with the smaller brass, such as PPC and 6BR. However when neck sizing larger brass I've found they can produce runout, brass necks will compress where they are weakest causing runout. I've found the full length sizer die with the neck bushing results in LESS RUNOUT with the larger casings.
Bill
Bill
Neck sizing my .284 Shehane nets me <.001 run out using Wilson Neck Bushing Die and Lapua brass.
Using top quality dies and brass will make a world of difference.
If you are using un prepped commercial brass with over the counter neck dies I would bet that the issue lies in the brass itself and doing some minor prep to the brass to even everything out would dissipate the effects you are seeing.
Ask any serious long range (or short range for that matter) shooter and chances are that they are neck sizing only or using a combination of neck sizing with a very slight shoulder bump (read .001 or less) in cases from 6ppc right up to the big boomers.
I just purchased the rifle/brass on the EE, so I have yet to receive them. I wanted to get a set of neck bushing dies ordered ASAP, so I ordered the Redding Type S match die set and the .266", and .277" titanium bushings to get started.
What is the dimension of the chamber neck> If it is a custom tight necked chamber you will need to know the neck diameter. If the chamber neck is .272 or larger you shouldn't have to turn necks. Measure the thickness of your brass in the necks and choose the appropriate bushing to give you the neck tension you want.
justsomeguy
Regular
- Location
- Calgary-ish
If those don't work for you I've got others you can try before you buy any more.
Mine has a 269 chamber so will have to turn eventually when I get to new brass....now getting away using brass I bought from the original owner.
Mine has a 269 chamber so will have to turn eventually when I get to new brass....now getting away using brass I bought from the original owner.
It looks like the .267"s will work fine. Now I need to wait for my neck bushing die set to arrive, before I can deprime the fired rounds. The Hornady neck die that came with the rifle worked okay for truing up new brass before firing, but the depriming pin is too large to fit the flash hole in the brass.
Chinbullco
Regular
- Location
- NW Alberta
My Redding dies and bushings arrived today. What a relief to have the Redding dies to use instead of the Hornady neck sizing die, whose decapper rod won't even fit through the flash hole, and whose decapper rod slipped in the collet when I used it to true the necks before loading the brass. I had to put the die in the vice, and tighten the collet by striking the wrench with a hammer to keep it from slipping. As well, with my Redding or RCBS neck dies, I just adjust them until the die touches the shellholder, and they neck size without touching the shoulder of the case. If I adjust the Hornady die the same, it will collapse the shoulder on the case. Now that I have proper dies, I can necksize my fired cases, and finish my load testing.
.313 neck in the chamber and I am using a .307 bushing with .0124-.0125 neck thickness for a loaded round of .3088-.309 which gives me .002 clearance on either side.
