I've been reloading for 10 years now and for what ever reason I can't figure out whats going on with my 260 loaded ammo. Everything else I load for on my Rock chucker comes out at 0.000-0.002 mostly the 0.001 range.
So here is what I'm doing.
Lapua brass annealed every second firing.
Full length resizing and bumping the shoulder back .002" no expander ball.
Size up the necks with my Sinclair expander mandrels left a bit loose to float in the mandrel holder.
Trim and chamfer necks.
Put brass on a concentricity gauge and 100% of them are .000-.001 after
I've been using 140 ELDm bullets, but it doesn't matter, my other bullets are doing the same thing.
I thought the seating stem on my Forster Ultra might have been cracked, so I ordered 2 new ones. Lapped one to the 140 ELDm and both stems produce 0.001-0.005" most of the rounds are falling in the 003"-004" range.
Got fed up and ordered an Arbor press and Wilson seater, and am getting the same results.
I bought an inside neck reamer to see if it was possibly a donut forming causing me issues but it isn't.
They aren't compressed loads just the usual 42.3 of H4350.
WTF.........over
So here is what I'm doing.
Lapua brass annealed every second firing.
Full length resizing and bumping the shoulder back .002" no expander ball.
Size up the necks with my Sinclair expander mandrels left a bit loose to float in the mandrel holder.
Trim and chamfer necks.
Put brass on a concentricity gauge and 100% of them are .000-.001 after
I've been using 140 ELDm bullets, but it doesn't matter, my other bullets are doing the same thing.
I thought the seating stem on my Forster Ultra might have been cracked, so I ordered 2 new ones. Lapped one to the 140 ELDm and both stems produce 0.001-0.005" most of the rounds are falling in the 003"-004" range.
Got fed up and ordered an Arbor press and Wilson seater, and am getting the same results.
I bought an inside neck reamer to see if it was possibly a donut forming causing me issues but it isn't.
They aren't compressed loads just the usual 42.3 of H4350.
WTF.........over