Loads for .280 AI using N550

[TomYoung]

What starting and max. loads would you recommend for 168 gr. Berger VLDs and 162 gr. Hornady SST's. The Lapua site doesn't show any data for .280's. Eddybo built the gun for me, but we didn't get far in developing the load for it before he got sick. He strongly recommended that I use Vihtavuori N550. Finally have some.

Thanks,
Tom