The Sig Sauer 5.56x45mm NATO 77gr Open Tip Match (Sig Sauer part no. E556M4-20) pairs a 77-grain Open Tip Match with 5.56x45mm NATO chambering, built for precision and match shooting. Sig Sauer engineers it for shooters who need round-to-round consistency at distance. Uniform seating and a match-grade Open Tip Match keep group sizes tight at distance. In rifle ammunition, this is the load worth feeding a precision rifle or pistol built to shoot small groups.

Key Specifications

• The chambering is 5.56x45mm NATO, a caliber that shoots flat enough for serious distance work.
• The bullet weighs 77 grains, a weight matched to this caliber’s optimal barrel twist for accuracy.
• The bullet design is Open Tip Match, a match-grade construction built for consistency at distance.
• The case material is Brass, reloadable and corrosion-resistant for long-term storage.
• Each box holds 20 rounds, enough for a solid range session without constantly reordering.
• At about $1.28 per round in this box quantity, it is straightforward to budget for a training day or hunting season.
• The box ships at roughly 0.615 lb, a manageable box weight for shipping in bulk.

Frequently Asked Questions

What is the Sig Sauer 5.56x45mm NATO 77gr Open Tip Match best suited for? With 5.56x45mm NATO chambering and a 77-grain Open Tip Match, it is built for precision and match shooting.

Is this a match-grade load? Yes, it is loaded to the consistency standards competitive and precision shooters expect from a match or near-match bullet.

Is the brass reloadable? Yes, this load uses brass, which is standard reloadable brass for handloaders who want to recover components.

Buy the Sig Sauer 5.56x45mm NATO 77gr Open Tip Match

Serious shooters build load logs around ammunition this consistent. Order from our Lubbock, Texas gun shop and it ships fast to your door.