The Sig Sauer E223M120 Marksman 223 Rem 77 gr Open Tip Match round brings match-grade supersonic performance to shooters who demand tight groups and reliable terminal energy, with a 2750 fps muzzle velocity and 1293 ft-lbs of energy that make it well suited for precision target shooting, long-range training, and suppressed AR platforms where consistent flight and minimal dispersion matter; as part of Sig Sauers Marksman series, this 77-grain OTM load is engineered to deliver repeatable accuracy for competition and sight-in sessions while its brass casing and HazAir compliance ensure dependable feeding and safe storage, and the Open Tip Match bullet profile provides predictable ballistic coefficients for flatter trajectories and easier wind-call adjustments at extended ranges, making the round a solid choice for competitors, range officers, and experienced hunters transitioning to precision rimfire alternatives in their training regimen.