The Buffalo Bore Heavy .38-55 Winchester 255-grain Semi Jacketed Flat Point (Buffalo Bore part no. 11C20) is loaded to the pressures serious shooters expect from this small Montana company, not the watered-down velocities of mass-market factory ammo. This round is one of Buffalo Bore’s Heavy-rated loadings, pushed to higher pressure and velocity than typical factory ammunition for hunting and deep-woods defense, built around a semi-jacketed flat point that exposes lead at the nose for some expansion while the jacket keeps the bullet together for deep penetration. Buffalo Bore hand-inspects every batch and loads with quality brass cases and clean-burning powder to keep pressures consistent from box to box. It’s a strong choice for shooters who carry, hunt, or train with .38-55 Winchester and want a load that actually performs at the pressures printed on the box.

Key Specifications

• It’s chambered in .38-55 Winchester, so it runs in any firearm built for the standard factory cartridge.
• The 255-grain bullet weight sits toward the heavier end for the caliber, which shapes both recoil and penetration depth.
• The bullet is SJFP construction: it’s a semi-jacketed flat point that exposes lead at the nose for some expansion while the jacket keeps the bullet together for deep penetration, and expands on impact rather than driving straight through.
• This is one of Buffalo Bore’s Heavy-rated loadings, pushed to higher pressure and velocity than typical factory ammunition for hunting and deep-woods defense.
• Cases are brass, which reloaders can resize and reuse, and which feeds reliably in both revolvers and lever guns.
• It ships 20 rounds to a box, sized for range trips and practical carry rotation.
• A full case runs 12 boxes (240 rounds), the volume option for shooters who train or carry this load regularly.
• Buffalo Bore’s box price works out to about $3.64 per round, in line with other premium hard-use ammunition.
• Buffalo Bore loads and pressure-tests every batch in-house in Montana rather than outsourcing to a mass contract loader, which is why the velocities hold consistent box to box.

Frequently Asked Questions

Will the 255-grain SJFP bullet expand? Yes — it’s a semi-jacketed flat point that exposes lead at the nose for some expansion while the jacket keeps the bullet together for deep penetration.

How many rounds come in a box, and can I order a full case? Each box holds 20 rounds, and Buffalo Bore packs 12 boxes to a case for anyone who shoots or carries this .38-55 Winchester load regularly.

What is this Heavy loading built for? It’s one of Buffalo Bore’s Heavy-rated loadings, pushed to higher pressure and velocity than typical factory ammunition for hunting and deep-woods defense.

Buy the Buffalo Bore Heavy .38-55 Winchester 255gr SJFP

Buffalo Bore doesn’t cut corners on pressure or components, and this .38-55 Winchester SJFP load is proof — it’s built for shooters who stake their safety on their ammunition. Order it from our Buffalo Bore lineup at our Lubbock, Texas gun shop and it ships fast to your door, or browse the full rifle ammunition selection for more of what feeds your .38-55 Winchester.