6.5PRC N560 Berger 156 EOL

[ELR LVR]

I agree with Fast14riot. If there is a place to look, its in the range of 4 to 6.

One thing though is your combined group is wider than it is tall. That is a red flag and might suggest that your seating depth is not near optimal or probably more likely, that your rifle does not like the powder. Below is a powder ladder I shot with a 300 Norma at 800 yards. It illustrates the shape you want to see (tall and narrow).

There are several good suggestions above for other powders to try. I have had good enough luck with H1000 that I haven't tried the others.

Tall and Narrow during the ladder test---
--- indicating it's mainly your powder charge and a change in velocity
All other aspects are in tune
Correct?

 

[FeMan]

Tall and Narrow during the ladder test---
--- indicating it's mainly your powder charge and a change in velocity
All other aspects are in tune
Correct?

If a ladder is wide, I’ll try and fix that with seating or change powders. Vertical to me translates to what you are saying and I just look for the place(s) where it breaks over before heading vertical again.

I just shot a 5 shot group with my 284 at 1060 yards that had 1” of vertical. The brass was not annealed. The annealed shot 5” of vertical. Neck tension matters too!

 

[ELR LVR]

If a ladder is wide, I’ll try and fix that with seating or change powders. Vertical to me translates to what you are saying and I just look for the place(s) where it breaks over before heading vertical again.

I just shot a 5 shot group with my 284 at 1060 yards that had 1” of vertical. The brass was not annealed. The annealed shot 5” of vertical. Neck tension matters too!

I really like the 284 Win, it gives a lot of options and high BC bullets
A very versatile cartridge.
Very surprising your results with the neck tension and using NON ANNEALD brass?
I like the way Peterson 284 brass feels in its neck tension, feels same as Virgin 284 Winchester.
What brass were you using for your 1060 yd test here?

 

[FeMan]

My latest 1060 yard ladder was shot with Lapua brass. Here is the target. FWIW, there was a switchy tail wind and I held the same for all five shots. Just looking for vertical here. The grid overlay is 1-inch

 

[Gabe22BR]

Shot mine today with Retumbo-
1 barrel warmer & 3 for group at 100yds
144hybridill move to 300yds- see how it prints