Re: .223 whats my velocity
QuickLoad says the Benchmark is giving you 3479 f/s with pressures at 61,415 psi. SAMMI spec is 55,000 psi.
25.5 N133 is 3523 f/s at 64,625 psi.
Both loads are hotter than I'd feel comfortable with. Though if I had a 5.56mm chamber I'd be happier since the pressure limit for that is 62,366 psi but the cases also are thicker...