--- title: "Buffalo Bore .45 ACP Hard Cast 255gr 20rd" description: "Standard-pressure .45 ACP ammunition with a 255gr hard cast flat nose bullet, flash-suppressed powder, 850 fps velocity, and 409 ft-lbs of energy." canonical_url: "https://www.kygunco.com/product/buffalo-bore-45-acp-255gr-hard-cast-fn-850fps-me-409-ft-20rd" meta: author: KYGUNCO "og:description": "Standard-pressure .45 ACP ammunition with a 255gr hard cast flat nose bullet, flash-suppressed powder, 850 fps velocity, and 409 ft-lbs of energy." "og:image": "https://cdn.kygunco.com/assets/products/292576/thumbnail.jpg?v=1757684018" "og:image:height": "500" "og:image:width": "500" "og:title": "Buffalo Bore .45 ACP Hard Cast 255gr 20rd" --- > Index of every page on this site: [llms.txt](https://www.kygunco.com/llms.txt) [Home](https://www.kygunco.com/) / [Ammunition](https://www.kygunco.com/category/ammunition) / [Handgun Ammo](https://www.kygunco.com/category/ammunition/handgun-ammo) / BFF-31A/20 ![Main product image](https://static.kygunco.com/cdn-cgi/image/f=auto,w=600/assets/products/292576/main.jpg?v=1757684018) For illustration purposes only, this image may not be an exact representation of the product. # BUFFALO BORE 45 ACP 255Gr Hard Cast FN (850FPS/ ME 409 ft) 20rd Buffalo Bore 45 ACP ammunition loaded with a 255gr hard cast flat nose bullet. This standard-pressure load is designed for deep penetration without expansion and uses flash-suppressed powder. The 20rd package is listed at 850 fps with 409 ft-lbs of muzzle energy. $40.27 --- $2.01 per round ** 4 interest-free payments of **$10.07** with ![Sezzle logo](https://www.kygunco.com/brands/sezzle.svg) ** Online In Store ** Flat Rate $13.94 for every 25 lbs. Shipping to HI & AK may incur additional fees. ** Ships To Your Home Fulfilled by a partner warehouse. ** Partner Fulfilled ** Check Local Restrictions Not sure whether this item can be shipped to your area? Enter your ZIP code for a quick check. Item # 292576 Style BFF-31A/20 UPC 651815031019 Condition New Manufacturer [Buffalo Bore](https://www.kygunco.com/brand/buffalo-bore) Units Per Box 20 Caliber 45 ACP Weight 1 lb Due to popular demand, Buffalo Bore is now offering two heavy .45 Auto Rim standard pressure loads. Both loads feature premium Starline brass and utilize flash-suppressed powder to preserve shooter vision in low-light conditions—an essential consideration, as over 95% of civilian shootings in the U.S. occur in the dark when threats are most active. These loads deliver ballistic performance equivalent to +P .45 ACP ammunition, yet operate at standard .45 ACP pressures. They are safe for use in any .45 ACP revolver in normal operating condition, including all Colt and S&W Model 1917 revolvers. Real-world velocity tests were conducted using personal revolvers—not laboratory barrels. Notably, the newer S&W 4-inch Mountain Gun produced velocities nearly equal to older models with longer barrels, demonstrating the tighter tolerances of modern S&W revolvers. **Item #31A – 255gr Hard Cast Flat Nose Bullet:** - 869 fps – S&W Mountain Gun, 4-inch barrel - 795 fps – S&W Model 325 (Scandium), 2.5-inch barrel - 880 fps – S&W Model 1917 (1937 production), 5.5-inch barrel - 875 fps – S&W 1955 Target (25-2), 6.5-inch barrel Item #31A is engineered for deep penetration without expansion. It is capable of penetrating: - Stick frame and drywall construction walls - Both doors of a 2003 Dodge Ram - The skull of a black bear This load is ideal for outdoor use, including black bear protection. Expect approximately 27 inches of penetration in live tissue and bone. ** WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to [www.p65warnings.ca.gov](https://www.p65warnings.ca.gov). 0.0 ** ** ** ** ** 0 reviews ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ## Shop 45 ACP Firearms ```json {"@context":"https://schema.org","@graph":[{"@id":"https://www.kygunco.com/#website","@type":"WebSite","description":"Shop KYGUNCO for firearms, ammo, accessories, parts, and outdoor gear at low prices with fast, easy nationwide shipping.","name":"KYGUNCO","url":"https://www.kygunco.com/","publisher":{"@id":"https://www.kygunco.com/#/schema/organization/kygunco"}},{"@id":"https://www.kygunco.com/product/buffalo-bore-45-acp-255gr-hard-cast-fn-850fps-me-409-ft-20rd#webpage","@type":"WebPage","description":"Standard-pressure .45 ACP ammunition with a 255gr hard cast flat nose bullet, flash-suppressed powder, 850 fps velocity, and 409 ft-lbs of energy.","name":"Buffalo Bore .45 ACP Hard Cast 255gr 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