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379240HV308 Technical Profile © Application: General Hunting

Barrel Bore Diameter: 0.373" 9.470 mm The diameter of the barrel from land to land.

Barrel Groove Diameter: 0.379" 9.630 mm The diameter of the barrel from groove to groove.

Bullet Weight: 240gr 15.6g Bullets are guaranteed to weigh within 0.25% of the stated weight.

Bullet Length: 1.14" 28.850 mm

Secant Ogive Length: 0.35" 8.834 mm These dimensions are critical to consistent external ballistic performance and are held constant to within 0.005 mm (0.0002")

Meplat Diameter: 0.21" 5.400 mm

Min Bullet Protrusion: 0.42" 10.650 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: 0.94" 24.000 mm

Bullet conforms to CIP and SAAMI for magazine length. Check the magazine length of your rifle for suitability with this bullet.

Maximum M/V: 4800fps 1 463 m/s If the maximum muzzle speed is exceeded, dynamic stabilty problems may be encountered.

Short Range Twist: 18.8" / 477 mm or tighter 50.4 Cal/length or tighter Twist recommended if maximum hunting distances are 160 yards or 150 m. A tighter twist (smaller number) can be used.

Twist: Sg = 1.5: 19.0" / 484 mm 51.1 Cal. in length General hunting twist for average distances to 320 yards or 300 m. A tighter twist (smaller number) can be used.

Minimum Twist: 21" / 533.4 mm 56.3 Calibers in length The twist required for stable flight and good terminal performance further than 320 yds or 300 m. See the 'Notes' hereunder.

Minimum Impact Speed: 1500fps to 1600fps 457 m/s to 487 m/s At this impact speed, the bullet will open to at least double caliber.

Calculated Ballistic Coefficient - G1 profile

BC = 0.192 Maximum to 3150 fps Maximum to 960 m/s BC values are calculated at standard Metro values using a G1 profile. Any comparison with the BC values of other manufacturers is not valid as there is currently no standard method in use between manufacturers. Enter these values into an external ballistics program to calculate BC for your launch speed and distance. For excact values, shoot drop tables at the elevation and temperature for your location.

BC = 0.179 3150 fps to 1500 fps 960 m/s to 457 m/s

BC = 0.208 1500 fps to 0 fps 457 m/s to 0 m/s

Suitable Cartridges, with consideration of the above specifications:

38-55 Win

NOTES

A Gyroscopic Stability (Sg) greater than 1.1 is required for stable flight with HV and HP bullets. For hunting under 320yds/300m, an Sg of up to 1.5 or more can be used. For longer distances the Sg can be decreased but never less than 1.1.

*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.

379240HV308 Technical Profile © Application: General Hunting

Barrel Bore Diameter:	0.373"	9.470 mm	The diameter of the barrel from land to land.
Barrel Groove Diameter:	0.379"	9.630 mm	The diameter of the barrel from groove to groove.
Bullet Weight:	240gr	15.6g	Bullets are guaranteed to weigh within 0.25% of the stated weight.
Bullet Length:	1.14"	28.850 mm
Secant Ogive Length:	0.35"	8.834 mm	These dimensions are critical to consistent external ballistic performance and are held constant to within 0.005 mm (0.0002")
Meplat Diameter:	0.21"	5.400 mm
Min Bullet Protrusion:	0.42"	10.650 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:	0.94"	24.000 mm
Bullet conforms to CIP and SAAMI for magazine length.			Check the magazine length of your rifle for suitability with this bullet.
Maximum M/V:	4800fps	1 463 m/s	If the maximum muzzle speed is exceeded, dynamic stabilty problems may be encountered.
Short Range Twist:	18.8" / 477 mm or tighter	50.4 Cal/length or tighter	Twist recommended if maximum hunting distances are 160 yards or 150 m. A tighter twist (smaller number) can be used.
Twist: Sg = 1.5:	19.0" / 484 mm	51.1 Cal. in length	General hunting twist for average distances to 320 yards or 300 m. A tighter twist (smaller number) can be used.
Minimum Twist:	21" / 533.4 mm	56.3 Calibers in length	The twist required for stable flight and good terminal performance further than 320 yds or 300 m. See the 'Notes' hereunder.
Minimum Impact Speed:	1500fps to 1600fps	457 m/s to 487 m/s	At this impact speed, the bullet will open to at least double caliber.
Calculated Ballistic Coefficient - G1 profile
BC = 0.192	Maximum to 3150 fps	Maximum to 960 m/s	BC values are calculated at standard Metro values using a G1 profile. Any comparison with the BC values of other manufacturers is not valid as there is currently no standard method in use between manufacturers. Enter these values into an external ballistics program to calculate BC for your launch speed and distance. For excact values, shoot drop tables at the elevation and temperature for your location.
BC = 0.179	3150 fps to 1500 fps	960 m/s to 457 m/s
BC = 0.208	1500 fps to 0 fps	457 m/s to 0 m/s
Suitable Cartridges, with consideration of the above specifications:

38-55 Win


NOTES
A Gyroscopic Stability (Sg) greater than 1.1 is required for stable flight with HV and HP bullets. For hunting under 320yds/300m, an Sg of up to 1.5 or more can be used. For longer distances the Sg can be decreased but never less than 1.1.

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.