• This Forum is for adults 18 years of age or over. By continuing to use this Forum you are confirming that you are 18 or older. No content shall be viewed by any person under 18 in California.

Correct neck tension

I use .003" as the interference fit with the bullet deep into the neck.
Most my loads are seated near neck / shoulder junction. If the bullet
has a crimp groove; I will also crimp. On heavy game hunting loads,
you do not want them bullets pulling out under recoil and jamming
up a magazine.
 
What is the correct neck tension for hunting loads?
If you want a "one and all", I'd go .005".
Myself, I use a myriad of different amounts, depending on not only the rifle, but whether semi-auto (or not) and bullet weight. Real heavy bullet is high-recoiling rifles need a lot more tension than, say, a .243.
examples; .223 bolt gun; .003"
.223 semi auto .005"
.243 Win. bolt, .257 Roberts .003" to .004"
7mm Rem Mag bolt 120 grn .004"
7 mm Rem Mag bolt 180+ grn .005"
7mm Rem Mag semi auto (BAR) .005
.308 Win bolt .003" (has a lot of bullet contact)
.308 M1A semi-auto .004" - .005"
.375 H&H Mag .004" AND CRIMPED
You could just go with .005" and also crimp any heavy calibers (.338 and up) It also depends on what is accurate with your load. Am assuming you are using bushing dies - as any factory die will surely give adequate tension.
 
If you go heavier then .003" there can be an added issue. There is a very
good possibility that you can cave a shoulder in going tighter. I know this
personally. Some time back, I went to the range and a round chambered
tight, and the next one did not. Younger and dumber. I had just learned
about annealing and that heavy seating and softer shoulder made a large
enough bulge to tie things up......"DO" chamber check every round you
hunt with. You don't want this to happen when pissing off a bear, and your
back up is only a knife......LOL My bear back up is a .41 Mag
 
Last edited:
If you go heavier then .003" there can be an added issue. There is a very
good possibility that you can cave a shoulder in going tighter. I know this
personally. Some time back, I went to the range and a round chambered
tight, and the next one did not. Younger and dumber. I had just learned
about annealing and that heavy seating and softer shoulder may a large
enough bulge to tie things up......"DO" chamber check every round you
hunt with. You don't want this to happen when pissing off a bear, and your
back up is only a knife......LOL My bear back up is a .41 Mag
Personally, I always keep one fully functioning round available so I can shoot myself just before the "bear" arrives! Lol.
Paul
 
In to read guys post TENSION in thousands of an inch! It never gets old! :)

.003 on one neck in a given caliber... or even the same caliber and batch of brass doesn't mean the neck tension is at all the same.
 
In to read guys post TENSION in thousands of an inch! It never gets old! :)

.003 on one neck in a given caliber... or even the same caliber and batch of brass doesn't mean the neck tension is at all the same.
Agreed. A repeatable process with cleaning, lubing, brushing & bushing is about all we can do without one of those computer seaters things.
Mine ALL seat with the same feel & dial #'s
 
If I go -0.002 bullet diameter inside neck with my 20p AR the bullet will shift into the case slightly when loading off the bolt release. I had Lee make a custom crimp die, slight crimp no more movement (even in cold weather). Hasn't seen any difference in poi, or group size. Winter coyote rifle.
 

Upgrades & Donations

This Forum's expenses are primarily paid by member contributions. You can upgrade your Forum membership in seconds. Gold and Silver members get unlimited FREE classifieds for one year. Gold members can upload custom avatars.


Click Upgrade Membership Button ABOVE to get Gold or Silver Status.

You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.


To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.

Forum statistics

Threads
165,863
Messages
2,204,710
Members
79,160
Latest member
Zardek
Back
Top