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HiBC · February 15, 2013, 04:23 PM

I take it you are loading 50 BMG,given the bullet weight and powder charge.

Be sureyou do nothing to the walls of your primer pocket,in other words,don't cut in a gas leak.

I have no experience loading 50 BMG

If the crimp is catching an edge of the cup going in,and is being forced,could maybe cause some problem.

Do you have the means to measure and control how much you set the shoulder back when you resize?Are you bumping the shellholder off the die?
If so,you can create a condition resembling excessive headspace by setting the case shoulder back.
On firing,cartridge is driven fwd by the firing pin.The case obturates and grips the chamber walls.If there is clearance between primer and the bolt face,the primer can blow back to the bolt face.

Seems like I heard there is something about using a dial indicator or gage of some kind to control primer seating on the 50.

You are in a tough spot,the ammo stuff is expensive,but,that hot gas sure cuts steel fast.

So,how do you feel about shooting glasses,seeing what a little gas does to steel?

February 15, 2013, 04:23 PM	#10
HiBC Senior Member Join Date: November 13, 2006 Posts: 8,286	I take it you are loading 50 BMG,given the bullet weight and powder charge. Be sureyou do nothing to the walls of your primer pocket,in other words,don't cut in a gas leak. I have no experience loading 50 BMG If the crimp is catching an edge of the cup going in,and is being forced,could maybe cause some problem. Do you have the means to measure and control how much you set the shoulder back when you resize?Are you bumping the shellholder off the die? If so,you can create a condition resembling excessive headspace by setting the case shoulder back. On firing,cartridge is driven fwd by the firing pin.The case obturates and grips the chamber walls.If there is clearance between primer and the bolt face,the primer can blow back to the bolt face. Seems like I heard there is something about using a dial indicator or gage of some kind to control primer seating on the 50. You are in a tough spot,the ammo stuff is expensive,but,that hot gas sure cuts steel fast. So,how do you feel about shooting glasses,seeing what a little gas does to steel?