416380FN053 Technical Profile © Application: Dangerous Game Hunting

Barrel Bore Diameter: 0.408" 10.360 mm The diameter of the barrel from land to land.
Barrel Groove Diameter: 0.416" 10.570 mm The diameter of the barrel from groove to groove.
Bullet Weight: 378gr 24.5g Bullets are guaranteed to weigh within a quarter percent of the stated weight.
Bullet Length: 1.40" 35.510 mm
Conical Ogive Length 0.59" 15.000 mm These dimensions are critical to consistent external ballistic performance and are held constant to within 0.005 mm (0.0002")
Meplat Diameter: 0.22" 5.600 mm
Min Bullet Protrusion: 0.68" 17.250 mm Add the case length to these numbers to determine the maximum and minimum cartridge overall length that is possible with this bullet.
Max Bullet Protrusion: 0.98" 25.000 mm
Bullet conforms to CIP and SAAMI for magazine length. Case and COL based on: 416 Rigby. Check the COL of your rifle for suitability with this bullet as described above. Check the magazine length of your rifle for suitability with this bullet.
Maximum M/V: 2700fps 823 m/s If the maximum muzzle speed is exceeded, dynamic stabilty problems may be encountered.

Twist Rates are guidelines but the Minimum Twist must be observed 

Minimum Twist rate: 14" / 355.6 mm 34.32 Calibers For linear penetration, select a bullet that meets the minimum recommended twist rate or is tighter. See 'Notes'

Calculated Ballistic Coefficient - Standard Metro G1 profile. Based on: Cd = 0.809

BC = 0.197 Maximum M/V to 1950 fps Maximum M/V to 594 m/s Any comparison with the BC values of other manufacturers is not valid as there is currently no standard method in use between manufacturers.  These BC values are only for use in an external ballistics program. Use the three values, as given, to approximately calculate BC for your launch speed and distance. For exact numbers, shoot drop tables at the elevation and temperature for your location.
BC = 0.190 1950 fps to 1200 fps 594 m/s to 366 m/s
BC = 0.220 1200 fps to 0 fps 366 m/s to 0 m/s

Some of the Suitable Cartridges, with consideration of the above specifications:

500/.416 NE, 416 Rem Mag, 416 Rigby, 416 Taylor, 416 Weatherby Mag, 416 Ruger - Use the specification sheet above to determine whether this bullet is suitable for the cartridge you want to use, if it is not listed.


A minimum twist rate of 1:9.55202960144074" or tighter, is preferred for this FN bullet.
*Note that Sg increases as twist tightens.  *A 1:10" twist is tighter than a 1:12" twist within a given caliber only. *Twist rates given in caliber lengths can be compared across calibers. *Choose a bullet length best suited to your rifle twist and type of shooting.  *When a bullet is specified for a given twist rate, it can also be used in any twist that is tighter.  Using it in a slower twist than specified, is not advisable. *Some experimentation will be required to determine exact drop tables for your equipment and location.