Neck Lubricity.... Woops.


PDA






H&Hhunter
October 24, 2012, 06:53 PM
Just a heads up if you lube the the inside of your case necks before sizing, which I do.

I use a Q-tip dabbed in Imperial Sizing Wax and rub it inside my case mouth before sizing the case. After sizing I wipe it out with a dry Q-tip or I polish my cases in a corn media. The other night I got distracted an was in a hurry I guess. So I am seating bullets and the bullets are following in the seating plug out of case mouth on the down stroke. I did a couple before snapping to that I had forgot to wipe the imperial sizing wax out of the case mouths.

No big deal but Imperial is such a slippery lube that the bullet will try and follow your seating plug out especially with a real pointy bullet that jams up into the seating plug a bit. As soon as I wiped out the case mouth my bullets started seating normal again.

Just a heads up for it it ever happens to you.

If you enjoyed reading about "Neck Lubricity.... Woops." here in TheHighRoad.org archive, you'll LOVE our community. Come join TheHighRoad.org today for the full version!
Coltdriver
October 24, 2012, 07:32 PM
My choice is the RCBS case lube on a pad. About every fourth case or so I cut a little of it from the pad with the inside of the neck of a case.

I always clean my cases with a bit of denatured alcohol on a q tip afterwards as the powder will stick to the inside of the neck if I don't.

The expander ball slides in and out easier and it has made me wonder if without it you might not stretch the neck/shoulder up a bit.

Never had a clue that imperial wax was so slippery!

H&Hhunter
October 24, 2012, 11:32 PM
Since I started lubing the case mouths I've gotten less case stretch and longer life. I like the Alcohol trick. Thanks!

rcmodel
October 25, 2012, 12:36 PM
No amount of any kind of lube should allow easy enough bullet slip that your seater stem is pulling bullets back out of the case.

You have a case neck tension problem or it couldn't happen.

And maybe a seater stem that doesn't fit your bullet shape too.

Suggest you measure the expander plug out of your die.
It should be approximately .002" smaller then the bullet dia. in medium calibers.
Slightly less in small bores, and slightly more in big bores.

If it's too close to bullet dia it is over-expanding the case neck, and you will have problems like you are having.

rc

H&Hhunter
October 25, 2012, 09:33 PM
RC

Thanks for the heads up on all that.

If you enjoyed reading about "Neck Lubricity.... Woops." here in TheHighRoad.org archive, you'll LOVE our community. Come join TheHighRoad.org today for the full version!