Getting wierd pressure in my savage mod 10 22-250

[gatorman]

I read on here about someone else haveing this same problem and wonder
how they made out....Anyway the thing is sometimes with 55 grain bullets
and factory ammo,I will blow a primer and maybe the case will even have to
be knocked out of the chamber...So none of this is hot loads..Or not that I
am aware of...I mentioned this to a few others and they seem to thing
it is due to a copper coated barrel or the bore is too small..

But the barrel is clean and to me it seems that if the bore was too small that
more than a few rounds would do the same thing...Hell,once it blew the
ejector back and collasped the spring..I replaced all of this...

So there is something causing this odd pressure spike from time to time..
If anyone has any ideas,I would appreciate hearing them...thanks....

 

[joeniv]

One possibility -

once upon a time, I was shooting prairie dogs and would load / chamber a round in a warm (ok, it was hot) barrel. If I let the chambered round warm up, the primer would blow and the bolt would lock. Since I'm a pretty smart guy, it only took three occurances for me to figure out what was going on.

any chance you are shooting with your ammo laying out in the sun, gaining heat, or chambering on a warm to hot barrel? Powders do have temperature sensitivity issues.

those are my two cents...

-joeniv-

 

[jo191145]

How many different types of factory ammo has this happened too?

Just how clean is clean?
Some factory Savage barrels can be tough critters to tame. The 22-250 can make it even tougher.
Never owned one myself but they're rather notorious for hardened carbon in the throat.

 

[gatorman]

1- I thought maybe it was the temp. of the ammo as well.
But I shoot undera roof so I think that is ruled out....I know
what you mean though....

2- I use the foam cleaner and that stuff cleans very well...No copper
lefe in the bare at all....But one can not really tell if a bore scope
is'nt handy..But I scrub the hell out of it...Tried Remington-as
well as winchester...All with 55 grain.....Even my light to mid range
hand loads do it once in a while....I will be trying it again tomorrow
after another good cleaning...And with remington ammo again..
I am hoping it works this time..It may be a issue with to much copper
in the bore..I have heard of it befor,but not sure it is possible....Thanks
for your replies..
Maybe somone else will join in....

 

[TheSnake]

Just throwing in here:
What do your primers look like on the other rounds after firing?
Are you seeing any other sights of pressure on the non blown ones?
On one of the blown primer cases, can you re chamber them without a problem?
Do you have a tool to measure a new case and one of the blown ones to see how much the brass is growing after being fired?

Just some thoughts.

 

[gatorman]

Snake----The other rounds look normal I guess...Never tried to rechamber one
of the blown ones..But I can tell you this..You can put another primer in with your
thumb,lol...Drop right in with down issue...I have no idea what is up here,unless
the bore is too small...But if it was seems to me almost everyone would blow with
the higher pressures...
I hate to send it back to Savage as I have heard it takes forever to get your
rifle back from them...??

 

[jo191145]

The only foam cleaner I've used is Wipeout. Awesome stuff on copper removal.
Not so good on carbon.
Its possible you have layers of both carbon and copper accumulating in or near the throat.
Its also possible your firing pin has some damage or just ground to an incorrect radius.
Your are mopping that chamber dry after cleaning right?

One simple test for carbon i've heard of but never needed to try.
Clean that barrel till your convinced its spotless.
Douse patches or cotton with a mild cleaner like Hoppes #9 and Carefully insert them into the throat area without a jag so the rod can be removed.
Leave them in overnight.
If upon removal you see some gray on the patches you have carbon build up your normal cleaning is not dealing with.

Like I said. Never felt the need to try this myself. It makes some sense but,,,,,,,,,,, no first hand expierience.

No idea why just some and not others. A chrono would be helpful.

 

[TheSnake]

Well the fact that you can drop a new primer into the case by hand points to a real big problem and I would not shoot the rifle again until I figured out what was going on. If this were me, I would find a local smith to take it to and take a quick look. I would take the blown cases and unfired rounds with me.

Just for grins, where are the bad rounds printing on paper? Are they a lot higher than the normal ones?

 

[gatorman]

SNAKE------It will be shooting a decent group,like maybe 3-5 in a inch to inch and quarter at 250 yards and then if ones pops it will be anywhere...Like I say,I might shoot 3 rounds befor one decides to blow a primer......And I do need to get a battery for the chrony to check the muzzle velocity...It sure is a mystery....I am thinking faulty brass,but it would be odd to get this with two different bags of brass....????? Gator

 

[TheSnake]

SNAKE------It will be shooting a decent group,like maybe 3-5 in a inch to inch and quarter at 250 yards and then if ones pops it will be anywhere...Like I say,I might shoot 3 rounds befor one decides to blow a primer......And I do need to get a battery for the chrony to check the muzzle velocity...It sure is a mystery....I am thinking faulty brass,but it would be odd to get this with two different bags of brass....????? Gator

With the quality control that goes into major brand factory ammo, I wouldn't think it would be brass bad enough to do this. As I said, I wouldn't shoot this again until I figured it out. But if you are going to continue, please tell us you have a very good pair of shooting glasses, the kind that will stop a shotgun blast at 30 feet.

 

[BoydAllen]

Having a primer pocket open up that much is a sign that you are right on the edge of having the rifle blow up, and yet you seem to be taking these events pretty casually. I would have someone that is knowledgeable check out the rifle and ammo, and STOP SHOOTING IT UNTIL THIS GETS SORTED OUT!

Boyd

 

[gatorman]

Gonna send it back to Savage this week..God it scares me to death
to shoot the darn thing...I been using a string to pull the trigger.The rifle is
tied in a gun vise....Should have told you this....I know i'm crazy and have
papers to prove it...But I aint stupid to boot...Appreciate your kind
concern and all that stuff...Gator

 

[TheSnake]

Gonna send it back to Savage this week..God it scares me to death
to shoot the darn thing...I been using a string to pull the trigger.The rifle is
tied in a gun vise....Should have told you this....I know i'm crazy and have
papers to prove it...But I aint stupid to boot...Appreciate your kind
concern and all that stuff...Gator

Please let us know what they figure out.

 

[BoydAllen]

One thing that I would be looking for is a chamber with a shorter than standard neck. You may not know this, but factory chambers may be cut using more than one reamer for the same chamber. If the reamer that cut the neck was not set properly, and this resulted in a shorter than standard neck, then factory rounds with the longest necks, and shortest "headspace" could be driven forward during firing to the point that their necks would be crimped into their bullets, raising pressure. I know, a wild theory, but I think that it is worth investigating. For reloaded rounds, an extreme setback of the shoulder would produce a case that could do the same thing in a correct chamber, even though the length of the case is within spec. This can also happen by repeatedly firing light loads in rimless cases.

 

[gatorman]

Well..I just got back from the post office and it is sent
back to Savage..I will be glad to get it fixed,as I want
to try it in the F class shoots...
Also will be anxious to see just HOW long it takes to
get it back..I heard of one guy that has one out for
4 months amready...True or not? Anyway It's sent out..Gator :'(

 

[TheSnake]

Did Savage have you get an RMA code or send them some brass samples?

 

[gatorman]

well,from what I hear,if they do fix it,that they never tell you what the problem
was in the first place...

Back long ago I had some winchester 300 mag ammo that would not chamber right
and you could not even size it down..I contacted them and sent the box's back..
In a few days I got 4 new box's of ammo..Nothing said about what was wrong
with the other stuff..

Anyway I send it back to savage and now the waiting period begins....