Neck Separation??? - Page 4
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Old 09-29-2013, 02:38 AM   #31
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mseric, got any ideas on 22-250 powders? I've done a lot of research,and there's a lot of opinions. I don't want to use up my supply of varget trying to find the magic load, when the gun shoots pretty good now. Thanks for the help. Gary

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Old 09-29-2013, 02:44 AM   #32
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You are loading LOW pressure loads, that is just a dangerous as HIGH pressure loads.

What is happening is that the neck is not expanding fully in the chamber and flame is getting around the throat and flame burning your cases. I would check your bolt for flame cutting as well since your cases are not sealing the chamber.

Don't know if you are crimping or not, but I would lay off the crimping on your next batch.

Jim

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Old 09-29-2013, 03:39 AM   #33
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Sorry no, I do not own a 22-250, so I really can't help.

These guys have a preference for XBR and H-4895 with the 55gr bullets.

For the 50-60 grain bullets most commonly used in .22-250, you have a huge selection of good medium burn-rate powders, but we like the new IMR-8208 XBR powder and H-4895 because they deliver great accuracy and they are not temp sensitive.

Link.
http://www.accurateshooter.com/cartridge-guides/22-250/

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Old 09-29-2013, 01:45 PM   #34
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Thanks Jim, I agree. I did what all the gurus advocate: START LOW.
The load I started with(38gr H380) is the starting load in 3 out of 4 guides I looked at But obviously it IS too low for this rifle. I am now loading 35.8 gr varget(near max in some guides), and the "blackening" is not occurring. I'm watching my cases a lot closer now. Live and learn.
Thanis for your input, appreciate all the help I can get. Gary

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Old 09-29-2013, 01:47 PM   #35
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Thanks mseric, I've looked at their site, lots of info there. I'll keep looking. Meanwhile working on seating depths for the varget loads. Gary

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Old 09-29-2013, 02:50 PM   #36
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I can't tell you the number of times I have fired up the iPhone, opened the gun forum, seen the title of 'neck separation' and thought "my God, that sounds horrible'.

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Old 09-29-2013, 08:18 PM   #37
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heh, heh, heh. Sorry, but it IS horrible. Hopefully got it fixed with the help of the guys here on the forum.

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Old 09-29-2013, 08:57 PM   #38
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Quote:
Originally Posted by gwtx
kaido: The necks now look like they should, they are apparently sealing off as they should. I loaded and shot 10 rds today, and the cases look fine. They are on their 4th and 5th firing, and they are beginning to take a little more effort to close, and open the bolt. I'll do a full length resize before firing them again. No cracks or splits. I backed off to 35.8gr varget to see if the groups would improve. No, but it's still printing right around 1". Good enuff to put one in a hog. I'm thinking of trying some IMR 4064, or RL 15. I only have a little of each,and there's none to be found around these parts. I'll post back as soon as I get a chance. Thanks for the reply. Gary


That's some good news. I've been having the same issue with my .243, so might try upping the charge a little and see when it stops the blackening.
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Old 09-30-2013, 04:06 AM   #39
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Quote:
Originally Posted by kaido View Post
That's some good news. I've been having the same issue with my .243, so might try upping the charge a little and see when it stops the blackening.
Can you give the details of your 243 loads?
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Old 09-30-2013, 04:31 AM   #40
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The neck flow to the neck is very uneven. When you trim you should also turn the OD on the necks. The thick necks creates a crimping effect when the bolt is closed forcing the chamber neck against the bullet. Measure the thickness of the neck walls. Do not ream as this leaves uneven areas on the OD. Once you start trimming remember to check for incipient case separation. The brass you a trimming off has to come from some where.

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