308 OCW Interpretation Help

[Willoughby]

that's basically the way I do it at 100 yards
but I shoot a lot more bullets doing it
ignore horizontal
start .005 from the lands
load 3 of every half grain- from the middle to 2 grains above max
pick the middle group of the vertical similar groups
if it aint .5 or better - dial chosen load in using coal .010 at a time
I figure if it don't fly good at 100 it wont get any better on out there

[D.ID]

I use to do it at 100 and use allot more rounds, probably similar to what your doing.
I started moving it out when it became difficult to determine between the shots. When I got out to my 435 target: the same nine shots that had made a 1" vertical hole the day before threw 2 low and independent then 4 within a 1/2" vertical then proceeded to walk a foot up the page with the rest. back at 100 it made 1" vertical again.
Repeated with the same results. Then got in my log books only to find that, that exact load (the middle of cluster) was already confirmed as shooting all three of the best groups I'd had up to that point.
.
Since then, That's all I have needed. My load development and initial zero takes around 20 rounds total, has worked 8-10 times without missing a beat and is producing groups I never would have believed, some of which coming from old neglected el-cheapo rifles (the wife's and the huntin buddy's).

[Willoughby]

I'll try it
I got a new barrel that needs a load
Thanks much