splitting case necks

[375fan]

dustinm12,

How many times have the cases with split necks been reloaded?

[AZShooter]

Please give us more details. What brass are you using? Did you start with that brass in new condition or are you using brass you found on range or given to you? If you are mixing brass this could be why your groups at 600 yds are poor.

You mentioned you adjusted the scope and the point of impact remained low. Maybe there is an issue with the scope?

None of us are capable of knowing what you already know so take the following comments as intended to help.

In regard to brass only use new brass of same manufacture. Segregate the brass by number of times fired. Watch for signs of metal fatigue. Usually you can get 6-12 firings from a piece ( or more) of brass depending on how much you are work hardening or "working" the brass. Hot loads or excessive sizing can fatigue the brass making for a shorter life.

To be frank I have never annealed any of my brass but would consider it if the brass I were making required fireforming to make something like an ackley improved AND the brass was expensive like Lapua or RWS. For rem, win, or fed I have never bothered and I have been reloading for over 30 yrs.
Your choice.

Factory chamber neck diameters are larger than necessary. Upon firing the necks will expand to make contact with the chamber neck. If your brass is sized in a full length sizing die that has a sizer ball, the necks will be reduced in diameter in the top of the die. With the return stroke the sizer ball will open up the neck for "proper" neck tension which is usually around .003" smaller than the diameter of the bullet. The extra expansion in the chamber neck combined with the sizing of the necks smaller than necessary for the sizer ball is work hardening the brass so it splits. To be honest unless there are extremes in dimensions the splitting shouldn't happen for at least half a dozen firings or more.

Either you have some extreme dimensions in the chamber or you are using very old brass. Fill us in on the details.

One solution that can help extend brass life would be to use a S bushing style die so you are only sizing the necks down enough for proper neck tension. It would eliminate the excessive "working" of the brass during sizing. An even better solution is to rechamber with a minimal neck clearance chamber further reducing the working of the brass. Obviously this is best to do when you rebarrel.

Your turn. Give us more details and we will help you figure out your problem.

[dustinm12]

Well I do have a little more information. All the cases that did split were from Remington Core-Lokt ammunition that I had bought and fired before then reloaded only a few times. I'm waiting on my new bullet puller so I can check on my powder loads. I am also planning on taking some of my rounds and my gun to a gunsmith to get them checked out before I go out again or start reloading again.

I have started looking into case annealing and I'd like to get into doing that to extend the life of my brass, but its hard to do since a decent machine costs over $300. I don't plan on trying to do it by hand. I don't need anything else that could go wrong. But hopefully after speaking with a professional gunsmith I will be able to figure this problem out.

[MTBULLET]

Originally Posted by dustinm12

Well I do have a little more information. All the cases that did split were from Remington Core-Lokt ammunition that I had bought and fired before then reloaded only a few times. I'm waiting on my new bullet puller so I can check on my powder loads. I am also planning on taking some of my rounds and my gun to a gunsmith to get them checked out before I go out again or start reloading again.

I have started looking into case annealing and I'd like to get into doing that to extend the life of my brass, but its hard to do since a decent machine costs over $300. I don't plan on trying to do it by hand. I don't need anything else that could go wrong. But hopefully after speaking with a professional gunsmith I will be able to figure this problem out.

you don't NEED a machine to anneal.
a few old brass to learn with
a propane torch
a dark room
a can of water
a deep well socket adapted to run in a cordless drill/screw driver helps
within a few minutes you'll have the process down
tons of info about annealing on the web, and very easy to do.

[Sully2]

Originally Posted by dustinm12

Well I do have a little more information. All the cases that did split were from Remington Core-Lokt ammunition that I had bought and fired before then reloaded only a few times. I'm waiting on my new bullet puller so I can check on my powder loads. I am also planning on taking some of my rounds and my gun to a gunsmith to get them checked out before I go out again or start reloading again.

I have started looking into case annealing and I'd like to get into doing that to extend the life of my brass, but its hard to do since a decent machine costs over $300. I don't plan on trying to do it by hand. I don't need anything else that could go wrong. But hopefully after speaking with a professional gunsmith I will be able to figure this problem out.

No machine needed at all. I use a baking pan...with about 1" of water in it...stand the casings up in the water ( cant get the head too hot that way) and heat the mouth and shoulder area and you'll see it change color......then tip it over in the water with the propane torch.

If you cant anneal via hand held propane torch....then give up reloading cause there isnt any part easier!!!

[dustinm12]

Sully2,

I have read a lot from people using the same technique you are talking about with tipping the cases over in water. The only issue I keep hearing about this way is not being able to evenly heat the cases all the way around. I guess that's why so many people are suing sockets with a drill so they can turn the case inside the flame. Do you do anything special to help with this or no?