I am putting the finishing touches on a load for my custom 280AI. I am using Nosler brass, Fed 210 primers, 140gr Nosler accubonds seated 0.100" off. With 58.5gr of H4350 I am getting AV of 2260fps with a 0.4" - 0.6" group at 100yds. 25" Lilja barrel. I still see no pressure signs, but I think that is fast enough.