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256097HV310 Technical Profile © Application: General Hunting

Barrel Bore Diameter: 0.250" 6.350 mm The diameter of the barrel from land to land.

Barrel Groove Diameter: 0.256" 6.500 mm The diameter of the barrel from groove to groove.

Bullet Weight: 97gr 6.3g Bullets are guaranteed to weigh within 0.25% of the stated weight.

Bullet Length: 1.02" 26.000 mm

Secant Ogive Length: 0.32" 8.251 mm These dimensions are critical to consistent external ballistic performance and are held constant to within 0.005 mm (0.0002")

Meplat Diameter: 0.20" 5.000 mm

Min Bullet Protrusion: 0.39" 9.860 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: 0.79" 20.000 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: 3200fps 975 m/s If the maximum muzzle speed is exceeded, dynamic stabilty problems may be encountered.

Short Range Twist: 8.4" / 214 mm or tighter 33.7 Cal/length or tighter Twist recommended if maximum hunting distances are 210 yards or 200 m. A tighter twist (smaller number) can be used.

Twist: Sg = 1.5: 8.0" / 212 mm 33.4 Cal. in length General hunting twist for average distances to 430 yards or 400 m. A tighter twist (smaller number) can be used.

Minimum Twist: 9.5" / 241.3 mm 38.0 Calibers in length The twist required for stable flight and good terminal performance further than 430 yds or 400 m. See the 'Notes' hereunder.

Minimum Impact Speed: 1400fps to 1500fps 427 m/s to 457 m/s At this impact speed, the bullet will open to at least double caliber.

Calculated Ballistic Coefficient - G1 profile

BC = 0.117 Maximum to 2300 fps Maximum to 701 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 exact values, shoot drop tables at the elevation and temperature for your location.

BC = 0.130 2300 fps to 1400 fps 701 m/s to 427 m/s

BC = 0.174 1400 fps to 0 fps 427 m/s to 0 m/s

Suitable Cartridges, with consideration of the above specifications:

25-35Win

NOTES

A Gyroscopic Stability (Sg) greater than 1.1 is required for stable flight with HV and HP bullets. For hunting under 430yds/400m, 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.

256097HV310 Technical Profile © Application: General Hunting

Barrel Bore Diameter:	0.250"	6.350 mm	The diameter of the barrel from land to land.
Barrel Groove Diameter:	0.256"	6.500 mm	The diameter of the barrel from groove to groove.
Bullet Weight:	97gr	6.3g	Bullets are guaranteed to weigh within 0.25% of the stated weight.
Bullet Length:	1.02"	26.000 mm
Secant Ogive Length:	0.32"	8.251 mm	These dimensions are critical to consistent external ballistic performance and are held constant to within 0.005 mm (0.0002")
Meplat Diameter:	0.20"	5.000 mm
Min Bullet Protrusion:	0.39"	9.860 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:	0.79"	20.000 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:	3200fps	975 m/s	If the maximum muzzle speed is exceeded, dynamic stabilty problems may be encountered.
Short Range Twist:	8.4" / 214 mm or tighter	33.7 Cal/length or tighter	Twist recommended if maximum hunting distances are 210 yards or 200 m. A tighter twist (smaller number) can be used.
Twist: Sg = 1.5:	8.0" / 212 mm	33.4 Cal. in length	General hunting twist for average distances to 430 yards or 400 m. A tighter twist (smaller number) can be used.
Minimum Twist:	9.5" / 241.3 mm	38.0 Calibers in length	The twist required for stable flight and good terminal performance further than 430 yds or 400 m. See the 'Notes' hereunder.
Minimum Impact Speed:	1400fps to 1500fps	427 m/s to 457 m/s	At this impact speed, the bullet will open to at least double caliber.
Calculated Ballistic Coefficient - G1 profile
BC = 0.117	Maximum to 2300 fps	Maximum to 701 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 exact values, shoot drop tables at the elevation and temperature for your location.
BC = 0.130	2300 fps to 1400 fps	701 m/s to 427 m/s
BC = 0.174	1400 fps to 0 fps	427 m/s to 0 m/s
Suitable Cartridges, with consideration of the above specifications:

25-35Win


NOTES
A Gyroscopic Stability (Sg) greater than 1.1 is required for stable flight with HV and HP bullets. For hunting under 430yds/400m, 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.