Over doing the neck sizing....

Reloading equipment, methods, load data, powder and projectile information.

Over doing the neck sizing....

Post by TassieTiger » 14 Mar 2020, 6:42 pm

So, wasn’t paying attention and placing too much pressure on lee neck due and holes in once fired 06 brass started coming out, looking a bit...narrow. I measured internal and was within a mm so neck sized about 50.
Anyway, I seated a few but something caught my eye.

At the base of the neck, there remains a small indentation - obviously from making the hole a fraction smaller than I should have - it’s something I’ve never really seen (or noticed) before.

When seating, I noted that the pressures to seat were up but not massively - I usually / previously have followed MM S advice re just a fraction tighter than finger tight but these are a fraction more than that.

Is there any danger in shooting or continuing to load these necked lap cases ? Over pressure ?
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Re: Over doing the neck sizing....

Post by Tiger650 » 14 Mar 2020, 7:34 pm

Case separation at the neck, that could be difficult to clear, pull the bullets, salvage the propellant and toss the cases.
Maybe anneal the cases if you must.
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Re: Over doing the neck sizing....

Post by TassieTiger » 14 Mar 2020, 7:50 pm

The black is just a carbon mark - I’ve looked at necks under a mag glass and they look fine - no splits, or cracks.
Once fired lapua cases - I know I can pull and FLS if consensus is negative to shoot.
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Re: Over doing the neck sizing....

Post by grumpy308 » 14 Mar 2020, 8:02 pm

Tassie Tiger. The necks should just expand back to normal size upon firing. The photo is not too clear but it does appear as though the extra pressure to seat the projectile has caused visible run-out on the loaded round. If you have some equipment to check run-out test to see if has some or just roll the round on a nice flat surface and see if the bullet runs true with the case. Regards Malcolm.
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Re: Over doing the neck sizing....

Post by TassieTiger » 14 Mar 2020, 8:41 pm

Cheers M - I think the hole in the case ended up being about .5mm smaller diameter than usual.
I took the de capping pin out of die, as I had zoned out and primed cases before necksizing - inadvertently making hole too small from neck sizing - as it looks like top of pin is sized for 308. (Wonder if same process might wirk with wife?)

The neck bulge is internal and just above shoulder and isn’t pronounced - I’m wondering if it might chamber slightly different as a result - and my concern is over pressure.

I only loaded up about 9 like this before stopping but I have 50 cases with smaller than ideal mouths.
Maybe I should re install pin, Re neck size against pin (.308) and pull the loads...it will ruin the primers but the brass is worth much more.
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Re: Over doing the neck sizing....

Post by Sergeant Hartman » 14 Mar 2020, 9:12 pm

I don't understand what you are saying.. but that's ok i an rather dumb.

But what i see is that the top few mm of the case neck is buldgeing slightly? If that's your question, then it's fine, your neck is generally slightly smaller than the bullet diameter.to have tension. The projectile is seated not fully down so a part of the neck has stretched to accommodate the bullet. Maybe your neck tension is see high due to the pin not present (unsure). It will shoot.

I have reused pushed out primers without any ill effect.
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Re: Over doing the neck sizing....

Post by TassieTiger » 14 Mar 2020, 9:16 pm

Your spot on Z - I should have edited the pic with an arrow or two to show the nice little waist that I’ve inadvertently made.
So I guess the neck tension will be high on those loads - will that spike pressure? I’m close to max recommended as it is...
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Re: Over doing the neck sizing....

Post by sungazer » 14 Mar 2020, 9:36 pm

I would go with what you suggested TT. Write off the primers and resize the cases properly. Shooting them as they are is going to give you really poor results, so that is a waste in itself that would be much bigger than the primer cost.
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Re: Over doing the neck sizing....

Post by Oldbloke » 14 Mar 2020, 10:37 pm

grumpy308 wrote:Tassie Tiger. The necks should just expand back to normal size upon firing. The photo is not too clear but it does appear as though the extra pressure to seat the projectile has caused visible run-out on the loaded round. If you have some equipment to check run-out test to see if has some or just roll the round on a nice flat surface and see if the bullet runs true with the case. Regards Malcolm.



+1 As someone else said, if you decide to dismantle them you can still use the primers.
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Re: Over doing the neck sizing....

Post by JimTom » 15 Mar 2020, 5:56 am

Mate do you neck size the entire neck of the case? I have my dies set to only do the top third or so of the neck.
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Re: Over doing the neck sizing....

Post by TassieTiger » 15 Mar 2020, 6:08 am

JT, I’m owning my mistake here. I completely stuffed up, I had a lot going on at time, arguing with missus, exhausted from a 10 hour day , dies were preset but I messed them up, then forgot about applicable steps, i should not have been in reloading room.

When I set up my neck die, I usually have it touching the top of ram plus 1/4 turn. After removing depriving pin/ball - for some reason I added 1 full turn. I did an old test case before locking off and it still didn’t register...lesson learnt. Just disappointing...the 50 lapua cases were once fired so were chamber size for next loading...
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Re: Over doing the neck sizing....

Post by JimTom » 15 Mar 2020, 8:30 am

At least you have worked out the issue mate. Glad you’ve got it sorted. Bet you don’t do that again eh.
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Re: Over doing the neck sizing....

Post by marksman » 15 Mar 2020, 9:39 am

l think they will be fine Tassie
the black soot on the necks indicates low pressure
with my 270wsm l used the soot to see how far to go with the amount of powder, more powder and the soot is higher up the case
if your load shoots well the soot wont hurt anything it just indicates that the neck is not expanding quickly enough to seal at the neck so a little bit of soot gets under the neck before it does, a higher neck tension is like putting in a bit more powder or seating the bullet a bit more into the case
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Re: Over doing the neck sizing....

Post by TassieTiger » 15 Mar 2020, 9:49 am

Thanks MM. appreciate the reply.
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Re: Over doing the neck sizing....

Post by TassieTiger » 20 Mar 2020, 8:34 pm

So this reply is for the perfect Mr Apollo who has seen it necessary to chastise me for apparently not knowing how to set up a re loading die - “you don’t even know how to set up a reloading die” in another thread.

Well mr Apollo, I’ve already loaded many thousands of rounds with those dies...and I have set up dies for quite an array of calibres...as previously mentioned, I had a lot going on and shouldn’t have been in reloading room.

What did I have going on ? Well the below photo was of my stomach, the day before I made the error. 3 hours of urgent stomach surgery means, that a person is generally discharged with enough narcotics to kill an elephant - and as I said, I shouldn’t have been in the room. I own the error, but I wanted to try and take my mind off the pain.

However, How does one get to a point, where they feel so self entitled, so self important, to make a blatantly ignorant statement about some ones abilities to do anything, when they have already eluded their mistake ?
I’m thinking quite a few ppl know the type of person that lays the boots in when one is already down...quite a few.
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ATA 686 U/O 12g & Baikal S/S 12g.
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Sauer 30-06 - VX 3
Howa 300 win mag. SHV 5-20/56
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Re: Over doing the neck sizing....

Post by Stix » 20 Mar 2020, 10:39 pm

Is that your tummy... :shock: ...ya fat bahstard... :lol:
:sarcasm:

He doesnt know what he's saying Tassie & probably wont remember in the morning so dont worry about it...

He's getting pretty old now & cant shoot as well as us these days anyway... :lol:

:sarcasm:

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Re: Over doing the neck sizing....

Post by TassieTiger » 20 Mar 2020, 10:52 pm

Listen here, your upsetting enough bloody people :sarcasm: without calling me a fat bastard...

They pumped in 5kg's of CO2 into my stomach to blow it up and because i was under so long, they had to do it again and it takes time for that gas to escape and well - it makes my stomach...ahh screw it. Yeah, yeah, i'm 95kgs at 6 ft 2 and on the wrong side of 45 so its to be expected.
She is a wee bit tender at present - My missus is loving the fact I cant pass wind or even cough. In fact, I shouldn't be on this forum - because if I start laughing at some of the dumb s**t, I'll pull me stitches lol :friends:

All good mate - Apollo being Apollo and all that. Ironically, he seems to be really, really upset over toilet paper eh?, maybe he's been one of the people in the markets, that this thread was eluding too :friends: .
I dont really care him calling me out - yeah, I screwed up, what ever.
Bit harsh your way, but I'm sure you'll not lose any skin. :drinks:

I need to get off the bloody net whilst I'm recovering though, keep researching more guns...and I DONT NEED MORE GUNS :allegedly:
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Re: Over doing the neck sizing....

Post by Sergeant Hartman » 21 Mar 2020, 7:04 am

You need to get a cz452 mate, well what happened... don't tell me your crazy ex (or current) decided she could make you wolverine.
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Re: Over doing the neck sizing....

Post by Gamerancher » 21 Mar 2020, 8:01 am

Can you re-assemble your neck die with the de-capping pin/neck expander adjusted so that it doesn't de-prime?
Just run it in and out of the neck and it should be good to go. If you are worried about the 9 rounds that you have loaded up, just pull the bullets and do those as well.
I can't see any problems shooting those off as is, may just not shoot to the same point as "normal". :thumbsup:
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Re: Over doing the neck sizing....

Post by John » 15 Apr 2020, 4:01 pm

Once fired brass no problem fire forming them back to size
Just think about fire forming cases for improved chambers and how much stress that puts on brass
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