Anyone had a neck tension problem with Remington bulk brass? Some new 7mm-08 brass will not hold bullets tight when seated. Have tried FL sizing in quality dies and also just running into a Hornady neck sizer die.
There is neck tension felt when seating the bullets (Remington and Sierra) but after a while it is easy to pull the bullets by hand. Not using a compressed powder charge and accuracy is excellent but no good for hunting loads having bullets move in the cases.

Would annealing the case mouths help?

Sounds like that's the problem. How much bullet grip do you have after sizing?? I like at least .003" for hunting..that would leave you an inside mouth diameter of .284-.003= .281

If you seat em into this much grip they actually loosen up later??

kraky

Using Lyman dies with their standard sizing plug which works fine with once or more fired Remington cases from factory ammo and also no problems with some once fired Winchester brass which has now been reloaded probably ten times or more and still going strong with no neck tension problems

My Remington 700 SPS has a tight chamber and I find I need to FL size each time. Also has little freebore so need to carefully watch seating of bullets. Remington 140gr Corelokt is just clear of rifling when seated to cannelure but Sierra Gameking bullets need to go a bit shorter on the OAL to clear the rifling.

Noticed the neck tension issue when first loading Rem Corelokt but decided to crimp thinking that maybe after a firing the brass would come right. After loading up a bunch of rounds using new Remington bulk brass and Sierra bullets to the same OAL I discovered I needed to seat a little bit deeper. Soon as I had did this I seemed to loose what neck tension I had and could easily pull the bullets by hand. Can't really crimp the Sierras without a cannelure/crimp groove.
Have reloaded for many years and never had this sort of problem.

Measure the diameter of a loaded round with the problematic brass vs. "good" brass. I would not be surprised, if the new, problematic brass has been made with thinner neck walls.

It would be unusual for new brass to have to be annealed, after all, it has been annealed during manufacturing.

- mike

I have the same problem with 10.75x68 Bertram brass. No problems with Horneber or RWS.

It would be an easy fix to take the resizing ball and spindel out of the die and put it in a drill motor and buff the ball down a bit with 0000# steel wool but I'd want to measure the ID of a neck or two of the Rem brass against some of the other stuff just to see if it is swedging down properly. Maybe it wasn't annealed correctly and is springing back too much?? That seems like the only possible answer. How does it feel as you draw the expander ball back up thru the neck??
I'd call Remington and see what they have to say.

stillbeeman

Have done a bit of measuring to get to the bottom of this:

The bullet diameter measures .2835" with my digital calipers.
The Lyman sizing plug .282" (from the FL sizing die)
The Hornady sizing plug .283" (from the neck sizing die)
The case neck sized OD without using the sizing plug is .306"
The case neck OD with a bullet seated is .310

I have ended up loading all the new brass using the Hornady neck sizing die without the sizing plug. This has allowed a good tight hold on the bullet with no springing back (yet anyway). The Sierra boat-tails allow this method after chamfering the case mouths and polishing the chamfer with fine wet and dry paper. Probably harder to do with flat base bullets though.

As a comparison a Winchester case with a seated bullet has the same .310” case neck OD so it appears as though the new bulk Remington must have the same brass thickness as the Winchester brass which loads with no problems and has a tight hold on the bullet.

I guess it appears as if the Remington brass is very springy and opens up slightly after sizing. I think I will anneal after the first firing if the brass shows no sign of loosing this springiness. A bit of a let down when paying for new brass to have to do this step.

Thanks for all the comments

I'm glad you found a solution but I'd still be on the phone bitching at Remington. Sometimes companies will be aware of a problem but can/will only deal with it as the complaints come in.