Vihta N5xx series : which primer ?

[jps2]

Hi all,

I'd like to know if some of you get good SD with N5xx series ?

My loads in 6.5x47Lapua & numbers (same bullet seating) :
Scenar 139gr/CCI BR4/N150 at 2,38g : mean 832m/s sd 2.2
Scenar 123gr/CCI BR4/<span style="font-weight: bold">N540 </span>at 2,41g : mean 857m/s sd <span style="font-weight: bold">4.9</span>
Scenar 123gr/CCI 400/<span style="font-weight: bold">N540 </span>at 2,41g : mean 859m/s sd <span style="font-weight: bold">6.6</span>

Guess the N540 does not like the CCI, so have you any advice ?

Both three loads are under 1/2Moa @ 300m if shooter do his job !