The Firing Line Forums - View Single Post - AR15 Barrel Length vs Ballistic Effectiveness

Hard Ball · November 4, 2002, 10:35 AM

M193 ball has superior wound ballistic performance to many .223 commercial SP loadings particularly at striking velocities of 2,800+ feet per second. The performance of SP bullets in AR15s is variable to put it mildly. Much of it was designed for 1 in 12 inch twist barrels. Performance may be very poor in 1in 9 or 1 in 7 inch barrels.
If you intend to use SP ammunition in an AR15 select it carefully and test it thourgly on ballistic gelatin or deer size game before you decide to bet your life on it.

November 4, 2002, 10:35 AM	#15
Hard Ball Senior Member Join Date: November 28, 1999 Location: California Posts: 3,925	M193 ball has superior wound ballistic performance to many .223 commercial SP loadings particularly at striking velocities of 2,800+ feet per second. The performance of SP bullets in AR15s is variable to put it mildly. Much of it was designed for 1 in 12 inch twist barrels. Performance may be very poor in 1in 9 or 1 in 7 inch barrels. If you intend to use SP ammunition in an AR15 select it carefully and test it thourgly on ballistic gelatin or deer size game before you decide to bet your life on it. __________________ "I swear to defend the Constitution of the United States against all enemeis domestic or foreign WHOMSOEVER."