I seriously doubt this is case head separation but what do you guys think?

[L.Sherm]

Ok biged you you got him convinced carry on.

 

[timberelk]

Correct, your dies shoulder location matches your rifle chamber shoulder location and you do not need the competition shell holders.

But your dies inside diameter is smaller than your chamber diameter, so you are squeezing the case during sizing and making the case grow in length.

Thanks for the confirmation! How can I go about fixing the diameter issue? Different die set from a different manufacture?

 

[L.Sherm]

Listening to big ed is just gonna eventually lead you to a case head separation if you have to trim.012 everytime you fire those cases it's inevitable. He's comparing yours to a military chamber which we all know are big and ASSUMING yours is big the only way to know for 100% is a chamber cast and measure. So is it dies or chamber or both you have a problem so fix it don't just trim brass and carry on it will lead to bigger problems. Try a higher quality die I don't cosnider hornady that. Problem dies I have always had have been hornady there cheap for a reason so take it or leave it.

 

[DUSTY NOGGIN]

THE REDDING COMPETITION SHELL HOLDERS are by far the most helpful tool that i had added to my reloading process , i can not believe this is not a more suggested tool ?

it was a pricey step up for shell holders , but when you figure there are shell holder groups ... buying a set that covers multiple cartridges that you already load for makes that price point fade quickly

now that i have used em. i wouldn't hesitate to buy a set if there was only one cartridge i would use it for

timberelk , did you do lee kay today ???

 

[bigedp51]

Listening to big ed is just gonna eventually lead you to a case head separation if you have to trim.012 everytime you fire those cases it's inevitable. He's comparing yours to a military chamber which we all know are big and ASSUMING yours is big the only way to know for 100% is a chamber cast and measure. So is it dies or chamber or both you have a problem so fix it don't just trim brass and carry on it will lead to bigger problems. Try a higher quality die I don't cosnider hornady that. Problem dies I have always had have been hornady there cheap for a reason so take it or leave it.

The OP is measuring his fired cases and bumping the case shoulder back .001 or .002. On top of this he sectioned a case and had "NO" case stretching.

Chamber, dies and cases have plus and minus manufacturing diamentions. And you make due with what you have and adapt.

Now what does the illustration below say in the upper right hand corner.

Why do some of you have a problem understanding head clearance and case growth.

 

[L.Sherm]

I understand case growth just fine, but trimming .012 of the cases everytime you fire them does take a rocket scientist to figure what will eventually happen.

 

[L.Sherm]

Like I sad he can follow your advice if he wants it's all up to him but I'm done with.

 

[bigedp51]

I understand case growth just fine, but trimming .012 of the cases everytime you fire them does take a rocket scientist to figure what will eventually happen.

We don't need any rocket scientists we just need experienced reloaders.

Example, I have a lee .223 full length die that reduces the case diameter more than my RCBS die.
And the Lee die makes the case grow in length more than all my other .223 dies.

 

[timberelk]

Listening to big ed is just gonna eventually lead you to a case head separation if you have to trim.012 everytime you fire those cases it's inevitable. He's comparing yours to a military chamber which we all know are big and ASSUMING yours is big the only way to know for 100% is a chamber cast and measure. So is it dies or chamber or both you have a problem so fix it don't just trim brass and carry on it will lead to bigger problems. Try a higher quality die I don't cosnider hornady that. Problem dies I have always had have been hornady there cheap for a reason so take it or leave it.

I'm willing to upgrade does if it will help. What die would you recommend?

 

[timberelk]

THE REDDING COMPETITION SHELL HOLDERS are by far the most helpful tool that i had added to my reloading process , i can not believe this is not a more suggested tool ?

it was a pricey step up for shell holders , but when you figure there are shell holder groups ... buying a set that covers multiple cartridges that you already load for makes that price point fade quickly

now that i have used em. i wouldn't hesitate to buy a set if there was only one cartridge i would use it for

timberelk , did you do lee kay today ???

Yeah I was out at Lee Kay, was some crappy weather to be shooting in! We're you out there?

 

[DUSTY NOGGIN]

Yeah I was out at Lee Kay, was some crappy weather to be shooting in! We're you out there?

no i was gonna go, hope tomorrow is better , have a few workups to do

 

[bigedp51]

Listening to big ed is just gonna eventually lead you to a case head separation if you have to trim.012 everytime you fire those cases it's inevitable. He's comparing yours to a military chamber which we all know are big and ASSUMING yours is big the only way to know for 100% is a chamber cast and measure. So is it dies or chamber or both you have a problem so fix it don't just trim brass and carry on it will lead to bigger problems. Try a higher quality die I don't cosnider hornady that. Problem dies I have always had have been hornady there cheap for a reason so take it or leave it.

UPDATE FROM OP...

Anyways I digress... I set my FL die up to push the should back .001-.002 and the cases each grew between .005-.007 in total length. I then trimmed them all to .025 (a few were trimmed a little too far to .022-.024) and put them in the tumbler. Then I loaded them all up and went out a shot them.

I then measured each one and it looks like half of the cases stretched by .001-.003. A few stayed the same and a few appeared to shrink but those could be the ones that were accidentally trimmed to far to .022.

L.Sherm
The last time the OP sized his cases they only grew .001 to .003 in length.

So why don't you read all the posts before shooting your mouth off.

 

[Barrelnut]

Like I sad he can follow your advice if he wants it's all up to him but I'm done with.

Sherm, before you pack your bags. Have a look at post #60 below. Lots of noise on this thread, but, to me, looks like the cases are only growing a total of .006 ~ .008 after the first firing. IMO, that is most likely being caused by the expander ball dragging on the neck and stretching it when the expander exits the case neck....

I just finished FL sizing fifty 6.5 Creedmoor Hornady cases. Bump back was .001~.002. Total case length was about .001~.002 longer after sizing. That means the expander (and brass flow) grew the neck .001~.003. That's on some brass that's on the sixth firing (annealed at 4). I also didn't clean the brass. So the necks are lubed with carbon from the last firing. Also I'm using a bushing die with about a .002 bushing and an expander ball.

Now consider that the OP is using a regular sizing die. I think that standard die is stretching the neck more. Add that to the fact (as Bigedp51 seems to think) the die doesn't match the chamber too well, you end up with a case that has a total length that is .006 after firing.

Hope that makes sense..

Im back with some info...

First picture is a case that stretch approx .012" (from 2.025 to 2.037 after being fired once). Cut it in half with a dremel and I can't seem to see any eveidence of case beginning to separate.

Next picture is the black lines of another case that stretched to 2.037 from 2.025 after being fired once (both pieces of brass have been fired a total of 2 times). Those black line signify the locations that I measured the diameter of the case.

Before I full length resized:
Case length = 2.037
Shoulder via hornday guage = .626"
Diameter at top ring = .458"
At middle ring = .461
At bottom ring = .469

After full length resizing(die touch shell holder plus 1/4 turn)
Case length = 2.043 (grew .006")
Shoulder = .624 (shrank by .002")
Top line = .453 (shrank .005")
Middle line = .458 (shrank .003")
Bottom line = .466" (shrank .003")

 

[bigedp51]

I'm willing to upgrade does if it will help. What die would you recommend?

Why would buy a new die when the last time you sized your cases they only grew .001 to .003.

When you come into a forum you are going to have to learn to sort the BS from the facts.

Your cases are telling you something and .001 to .003 case growth is nothing after sizing.

Did you polish the expander?
Did you lube the inside of your case necks.

Subliminal suggestion below.