for all the guys that use factory loadings

[Blade1]

This is what is left of a box of federals my buddy brought over for me to try in his gun. I measured the seating depth and marked it on each individual case to in order to find 3 cartridges that measured the same for a 3 shot group. Runout is also all over the place.

 

[Blade1]

I managed to find 3 at the same seating depth. They measured 3.106". One had .001" runout another had .002 and another had .004 runout. I fired one round that was seat to 3.105" to see if there was any difference in Point of impact. Here are the results. 100 yrd target.

 

[Zen Archery]

Hmmm.... I'd say that has less to do with thousandth of inch seating depth then it does with other issues (powder, crimp pressure, the bullet performance, external ballistics, shooter etc...) I am really anal about CBOT loads out of my .308. But I do allow .001 room. Out to 1000 yards see no difference in performance at extended ranges.

 

[918v]

I managed to find 3 at the same seating depth. They measured 3.106". One had .001" runout another had .002 and another had .004 runout. I fired one round that was seat to 3.105" to see if there was any difference in Point of impact. Here are the results. 100 yrd target.

The .001" seating depth difference will not cause a 1" poi shift.

 

[Blade1]

Hummm! must have got lucky. I never said that. There are more issues than that. Thats just the start.

 

[918v]

You implied it.

 

[Blade1]

No i stated the facts.