N555 Powder

At Vihtavouri's max listed charge of 42.0 grains behind Hornady 140gr ELD Match, the groups come together quite nicely but I was seeing 100 fps less than the 2700 they promised. Was using Lapua SP brass and a much shorter barrel than their test unit.
 
I tried it, and 4350 behind the 140 gr bullet.

Did not like the speeds I was getting out of a 26" barrel in the 2700 fps range, so went back to using RL16 and 2900 fps range.
 
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