Wilson micro seater die & arbor press

[denobravo]

I have found that with the bullet sitting on the case in the wilson seater that if I spin top piece of the die I believe it centers the bullet in the cone and reduces bullet runout.

I shoot NBRSA
the guy that was or is mentoring me said.."always spin the top before you seat the bullet"
I asked him why , he said it centers everything...
maybe he is right

 

[Bat Rastard]

Good question!

1) I've been searching for zero runout or close to it and come to the conclusion to buy 2-3 hundred new cases and sort. Then shoot the cases with best runout, then the next best , and finally the cases with worst runout and analyze the three results. See number 4 below.

2) Use a non-bushing full size die to set/size headspace and neck dimension. Haven't tried this , yet.

3) With a full size bushing die, neck size down in increments of 0.001 or 0.002.

4) Don't worry about runout if it's below 0.005"!

My $0.02!

A question about #4

Is that .005 total indicator runout?
Or +/- .005?

 

[paulT]

A question about #4

Is that .005 total indicator runout?
Or +/- .005?

Typical loaded round runnout was between 0.003- 0.004 3 to 4 thousands however i have managed to reduce overall loaded round runout by losening both the seater stem and die adjustment Lock screws.