Let's see if I an make this short and sweet.
Lee turret press.
Started with factory new lapua brass within .001 on my Sinclair concentricity gauge. I quickly learned that expander balls or expanders of any sort kill concentricity so they have been long gone (were adding .003-.004 of runout).
Resizing with a rcbs $30 full length die added a thou of runout +/-. Its not my go to die. I only got it to FL size the brass as recommended prior to neck turning.
I neck turned a piece of brass on a k&m turner and then resized and runout was right at .001. I'm fine with that.
Here's where it got weird. I seated a bullet and case runout stayed at around .001-.0015 but runout a the ogive was .005 and halfway between that and the tip of the bullet was at .009"???
I'm not happy.
So is it the press, the die, or technique? Bullet seater is redding standard but with the micrometer added. I get the bullet started, turn a quarter, seat 3/4 the way, turn another quarter, finish seating then rotate half and give a final press.
I'm thinking its the seater, but the press I know isn't the best for precision.
Fwiw, this is a 260 cartridge an 140 amax bullet.
Lee turret press.
Started with factory new lapua brass within .001 on my Sinclair concentricity gauge. I quickly learned that expander balls or expanders of any sort kill concentricity so they have been long gone (were adding .003-.004 of runout).
Resizing with a rcbs $30 full length die added a thou of runout +/-. Its not my go to die. I only got it to FL size the brass as recommended prior to neck turning.
I neck turned a piece of brass on a k&m turner and then resized and runout was right at .001. I'm fine with that.
Here's where it got weird. I seated a bullet and case runout stayed at around .001-.0015 but runout a the ogive was .005 and halfway between that and the tip of the bullet was at .009"???
I'm not happy.
So is it the press, the die, or technique? Bullet seater is redding standard but with the micrometer added. I get the bullet started, turn a quarter, seat 3/4 the way, turn another quarter, finish seating then rotate half and give a final press.
I'm thinking its the seater, but the press I know isn't the best for precision.
Fwiw, this is a 260 cartridge an 140 amax bullet.
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