Savage 22-250 hard extraction(update)

[drover]

Do you mean "extract" rather than eject? If you mean extract then a little more information would be helpful.

Any markings on the fired and extracted cases? I have seen the issue you are having caused by a rough chamber, is it possible to get your hands on a borescope to look at the chamber?

You say the brass is new Lapua and that it has not been an issue until the third firing, but in reading what you posted above my next question is this - have you been using the same brass in both barrels?
If so then it is probably an issue with one barrels chamber being slightly larger than the other in the base where the brass is not being resized.
I have seen this happen in more than one instance and it is not an uncommon problem.

drover

 

[K22]

When I've seen this problem before especially in the 22 250 which is prone to case stretching it was due to one of the following in the following order:

1. Sizing - but you seemed to have eliminated that cause.
2. Crud in Chamber - but you said you clean it.
3. Over pressure - but you said you are not shooting hot loads.
4. Chamber out of round causing a bulge on one side of the case - but you said you measure the head area and it's ok.
5. Burrs in the chamber as evidenced by scaring of the cases - you didn't say anything about this but you would have if it was present.
6. I'm out of "cause ideas" - See below

It might be time to engage the services of a competent rifle smith. The first thing he will probably have you do is shoot a box of factory loads. If there is no extraction problems then obviously the problem is with your reloads.

You may want to try a different brand of brass.

 

[josebd]

When I lift bolt up and try to eject round,it even did it with nosler brass,but I think it’s with my resizing

 

[josebd]

It didnt do it the first 50 rounds or so

 

[josebd]

That’s why I’m thinking it’s on my resizing

 

[gambleone]

What's your bullet, powder charge weight, seating depth BTO?

Like stated above: What's your powder charge wt & what bullet?

 

[josebd]

Like stated above: What's your powder charge wt & what bullet?

First loads are sierra 77hpbt
1 35.5
2 35.7
3 35.9
4 36.1
5 36.3
6 36.5
7 36.7 36.5 i max load,it did it even on the lower charges

2nd group hornady 75 eld-m
1 36.2
2 36.4
3 36.6
4 36.8
5 37.0
6 37.2
7 37.4. 37.2 is max all the primers looked great
H4350

 

[hogpatrol]

What is the barrel twist?

 

[josebd]

8 twist,shilen

 

[22BRGUY]

It does it on low powder charge also

You can have a HIGH PRESSURE EVENT with a "low powder charge" VERY EASILY ALSO!
IF the bullet is NOT exiting the barrel fast enough, the built up HIGH PRESSURE in the barrel behind the bullet, CAN back up since it can't exit and DETONATE the remaining yet unburned powder.....BE CAREFUL about low charges just as much as high charges,
This is just a possibility, BUT also causes hard bolt lift.

 

[boltfluter]

Jose,

Do you have a .243 or 30-06 die laying around? If so I would try sizing the base with one of these dies. They may have a smaller base diameter that would help with the diagnosis. Just a thought. I use a .308 die to size my Dasher brass when it gets tight. It works great! Let us know and good luck.

Paul

 

[josebd]

I just measured a factory round toward the base of cartridge it measures .463,the ones I resized measure .465.
I'm going to try to setup my fl forester die and see if I can correct the problem

 

[Texas10]

Jose,

Did you, or do you chamber all empty, resized brass to confirm your sizing operations? Will the brass that was hard to extract chamber again before sizing?

Are you trimming case length every time you size, every third time?

I shoot a 28 inch X-Caliber, 8 twist 22-250 using Lapua brass and 69 to 80 grain bullets over H-4350 in your weight ranges without problems, so probably not your load.

If none of the above posts seem to resolve your problems, try taking one as-shot brass and one that has been resized, drill and tap the flash hole to fit a segmented cleaning rod, install the case loosely on the cleaning rod and slide it into the chamber with a firm push. Check for any tendency to stick going in or out. Rotate the case around in 30 degree increments while inserting and withdrawing, this will tell you if your neck is out of round with your case. Look for any scoring on the case walls too. Then push the case in and rotate several times. Look for scoring upon removal.

Have you performed a runout measurement on your sized and unsized brass?

That's all the ideas I can come up with. Hope you find a way to resolve this soon!

 

[josebd]

Ok I took a fired brass that I shoot yesterday, measured toward the base it was .466
Fired shoulder length 2.083
Measured the shoulder just below neck .419

Full length resized,bumped the shoulder to 2.079
Shoulder measured .416
But at the base it was the same .466?

 

[josebd]

I just put one of the fired rounds in it,it closed kind hard but ejected the round,tried another one, bolt closed kinda hard,hard to eject(pull out of chamber) tried a brand new case,with the same measurement at the base .465 cycled easy?

 

[josebd]

im going to clean the chamber to see if that helps

 

[hogpatrol]

im going to clean the chamber to see if that helps

Have you borescoped it? We've been down this road before on these forums. Guys swear up and down their barrels are clean then they take a look with a borescope and get a real eye opener. Unless you borescope it, you'll never know for sure how clean it is. My money is still on a carbon ring.

 

[josebd]

Were would that ring be? In the chamber

 

[hogpatrol]

Were would that ring be? In the chamber

Check out this thread:

http://forum.accurateshooter.com/threads/carbon-ring-what-is-it-where-is-it.3912845/

 

[josebd]

So it should do it on every piece if brass?