Messing with this 6.5 Creedmoor FLS die made my Hornady.
I noticed with my bullet seating pressures were a bit inconsistent.
Just ever so slightly mind you.
All Necks of the brass measured the same inside and the outsides of the necks were
withing 1/2 a thousandths ..this is store bought ammo brass that comes in a 20 round box.
Fired and resized annealed etc.
I got the measuring tools out and found I was only getting .001" interference fit.
I polished the expander ball with 320 sandpaper then 800 grit and now get.
a little over .0015" interference fit.
This is based on measuring Neck OD before and after seating a bullet.
It was .002" different before sand and polishing and is now .0035" difference.
Seating pressures felt all the same this time around.
We will see.
The factory rough machined surface of the expander is now looking like polished chrome.
I would ultimately like .003" interference fit but will test this first.
I noticed with my bullet seating pressures were a bit inconsistent.
Just ever so slightly mind you.
All Necks of the brass measured the same inside and the outsides of the necks were
withing 1/2 a thousandths ..this is store bought ammo brass that comes in a 20 round box.
Fired and resized annealed etc.
I got the measuring tools out and found I was only getting .001" interference fit.
I polished the expander ball with 320 sandpaper then 800 grit and now get.
a little over .0015" interference fit.
This is based on measuring Neck OD before and after seating a bullet.
It was .002" different before sand and polishing and is now .0035" difference.
Seating pressures felt all the same this time around.
We will see.
The factory rough machined surface of the expander is now looking like polished chrome.
I would ultimately like .003" interference fit but will test this first.
