WebApr 26, 2016 · RPM = ( (12/T) x V) x 60 Where T = Twist Rate, and V = Muzzle Velocity. So, using this formula I worked out the spin rate on my .303. RPM = ( (12/10) x 2460) x 60 = 177 120 RPM (T =1:10, and the muzzle velocity for Federal Power Shock ammo is 2460 fps.) WebDec 17, 2014 · The subsonic bullet is the Lapua .308 Win 200gr traveling at approximately 1040fps. Keep in mind that the feet per second calculation is from the muzzle, not down …
Subsonic Shotshells An Official Journal Of The NRA
WebJun 19, 2015 · Buckshot and slugs are equally effective at subsonic velocities as they are at supersonic ones. The only practical difference is the range at which they should be employed. The speed of sound at... WebOn the other hand, a supersonic .300 Blackout ammo such as the 124 grain Sellier & Bellot round has a muzzle velocity of 2165 fps and 1285 ft/lbs of muzzle energy, Gel Test … the hemp man of texas
Subsonic Ammo – A Buyer’s Guide to the Quiet Side
WebMar 26, 2024 · 100° F - 1160 fps 70° F - 1130 fps 50° F - 1110 fps 32° F - 1090 fps 0° F - 1050 fps-10° F - 1040 fps Any colder than that and this Kentucky boy thinks you're crazy for practicing rimfire shooting. For "sane" or "normal" (like any of us fit those criteria) shooting conditions, 1050 fps will keep you subsonic. WebMar 11, 2024 · The subsonic SuperVel Hush Puppy 147 grain Full Metal Jacket 9mm (made for use with suppressors) is loaded to 900 fps velocity, which is around 50 to 100 fps slower than typical 147 grain ammunition. In comparison, Hush Puppy 115 grain Full Metal Jacket 9mm ammunition is loaded to 1000 fps, about 150 fps slower than typical 115 grain … WebMar 25, 2024 · The speed of sound, known as Mach 1, varies depending on the medium through which a sound wave propagates. In dry, sea level air that is around 25 degrees Celsius, Mach 1 is equal to 340.29 meters per second, or 1,122.96 feet per second. Mach 1 rises with the density of the medium. the beast from 10000 leagues