New reloader here! I Went to the range yesterday to try a few charge weights to find my preferred load and wanted to know how much variation in group size do you see when gradually stepping up charge?
My plan was to find the best 5rd group, then load 10 rounds each of +./- .1 and check the velocity and if it’s good enough then id start fiddling with seating depth.
Shooting a 20” factory Remington 700 SPS tactical in .308.
Loaded 168 SMK in Federal GMM once fired brass with Varget. Plan was 43gr-45gr in .3 increments.
43grs did best at .67 MOA
43.3 was about 1” so much larger I didn’t bother to use a measuring app)
And it continued with everything being around 1-1.2
Until it dropped to .78 MOA at 44.8.
Everything felt good on all these aside from the occasional shooter induced flyer that I called. I allowed barrel/shooter to cool for a few minutes between groups.
How frequently do you find multiple promising charge weights that far apart?
Do you see groups open that quickly with just .3gr difference?
Also any other advice or knowledge on my process would be appreciated.
My plan was to find the best 5rd group, then load 10 rounds each of +./- .1 and check the velocity and if it’s good enough then id start fiddling with seating depth.
Shooting a 20” factory Remington 700 SPS tactical in .308.
Loaded 168 SMK in Federal GMM once fired brass with Varget. Plan was 43gr-45gr in .3 increments.
43grs did best at .67 MOA
43.3 was about 1” so much larger I didn’t bother to use a measuring app)
And it continued with everything being around 1-1.2
Until it dropped to .78 MOA at 44.8.
Everything felt good on all these aside from the occasional shooter induced flyer that I called. I allowed barrel/shooter to cool for a few minutes between groups.
How frequently do you find multiple promising charge weights that far apart?
Do you see groups open that quickly with just .3gr difference?
Also any other advice or knowledge on my process would be appreciated.