unexpected poor loaded runout

[retired]

i know no one shooting real precision using a lee collect die. that would be my first change.
a neck bushing die and a body when you need to bump.

 

[swadiver]

You want to have the point of the dual indicator running on the full shank of the bullet as close to the olive as possible. If you get the point on the nose section then minor changes of position on the v blocks will show a false value of run out.

The procedure I use to seat the bullets is to seat the bullet about 50% then bring the press handle back up rotate the case about 90 degrees. Then fully seat the bullet. Then I raise the handle, rotate the case another 90 degrees and then bounce the handle of the press twice. And no this is not some magic potion.

I did tests on my loading procedure on a 3 sets of cases. Set 1 I seated bullets in one step. No rotation. I got about 35% of the 2 mil or less runout. Doing 1 rotation raised that 35 to about 50%. I was really sceptical of the double bounce trick but I tried it and sure enough I got another 10% or so in the 2 category.

I am also sceptical about not turning necks. No I would love to do something else but very few case necks, even Lapua, are uniform the full length and side to side. As you turn the necks you see all the inconsistencies before your eyes.

Also you will never get any batch of cases to all be 100 less than 2 mil run out. I load in batches of ~100 or 50. I sort in categories of run out. You always need foulers or back ups etc. Using that as part of your strategy will get better on target performance

David

thanks i will try your seating method. for my match ammo, i do sort out the worst runout rounds and use them for sighters/foulers. shot a mid range match (600 yds) yesterday and the rounds shot outstanding, so maybe it's not as big a deal as i thought. i am trying to avoid turning necks, but probably will succumb to that eventually

 

[swadiver]

i know no one shooting real precision using a lee collect die. that would be my first change.
a neck bushing die and a body when you need to bump.

maybe you can expand on that. certainly the Lee is well known to make very concentric necks. if you want to change neck tension, altering the diameter of the sizing mandrel will do that as well