Neck not gripping bullet tight enough?

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30 January 2008, 20:20

GAHUNTER

Neck not gripping bullet tight enough?

I have been using SB, RCBS .300 Win. Mag. dies for years, however, when I loaded the last batch of bullets (180-grain Nosler Partitions), it seemed like the bullets were seating awfully loose, so I pinched one and pushed. Low and behold, it slid back into the case.

Now, this was the first time I ever lubed the inside of the case mouth before before sizing. Could this cause loose necks?

Is this a die problem or a case problem?

30 January 2008, 20:52

seafire2

I've had this happen, it is either operator error... the die needed to be screwed down just a hair more...

I've had this happen to just a few cases out of a batch of say 20 also... on the one's that happened with, the neck thickness was just a hair less than the others... so tightening down the sizing die just a little more el9minated the problem...

When I have Lee Dies in that caliber, I use the neck sizer die to do that instead of the full length die... I also have broken off the decapping pin on purpose so I can do this, when the problem arises..

It is an extra step, but for safety's sake, I deprime all brass using a Universal DeCapping Die...

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30 January 2008, 23:05

bartsche

If I were experiencing what you are:

I would polish my expander down about .001"

Forget the inside neck lube if possible.

Make sure as you remove the case from the sizing die that you get a feeling that your expander is doing something.

roger

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31 January 2008, 00:09

buckshot

I believe you have a case problem. I have run across this before, where after resizing, cases expanded back acting as if no sizing had occurred.

31 January 2008, 01:00

butchloc

leon - after you've reloaded the cases over 50 times and scotch taped the neck cracks up, you just gotta expect some freeplay