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257067HV201 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: 0.257" 6.530 mm The diameter of the barrel from groove to groove.

Bullet Weight: 67gr 4.3g Bullets are guaranteed to weigh within 0.25% of the stated weight.

Bullet Length: 0.79" 20.000 mm

Secant Ogive Length: 0.37" 9.483 mm These dimensions are critical to consistent external ballistic performance and are held constant to within 0.005 mm (0.0002")

Meplat Diameter: 0.06" 1.650 mm

Min Bullet Protrusion: 0.45" 11.330 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: 0.67" 17.000 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: 12.9" / 327 mm or tighter 51.5 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: 14.0" / 345 mm 54.3 Cal. in length General hunting twist for average distances to 330 yards or 310 m. A tighter twist (smaller number) can be used.

Minimum Twist: 15" / 381 mm 60.0 Calibers in length The twist required for stable flight and good terminal performance further than 330 yds or 310 m. See the 'Notes' hereunder.

Minimum Impact Speed: 1600fps to 1700fps 488 m/s to 518 m/s At this impact speed, the bullet will open to at least double caliber.

Calculated Ballistic Coefficient - G1 profile

BC = 0.245 Maximum to 3200 fps Maximum to 975 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 = 0.201 3200 fps to 1600 fps 975 m/s to 488 m/s

BC = 0.187 1600 fps to 0 fps 488 m/s to 0 m/s

Suitable Cartridges, with consideration of the above specifications:

250 Savage

NOTES

A Gyroscopic Stability (Sg) greater than 1.1 is required for stable flight with HV and HP bullets. For hunting under 330yds/310m, 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.

257067HV201 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:	0.257"	6.530 mm	The diameter of the barrel from groove to groove.
Bullet Weight:	67gr	4.3g	Bullets are guaranteed to weigh within 0.25% of the stated weight.
Bullet Length:	0.79"	20.000 mm
Secant Ogive Length:	0.37"	9.483 mm	These dimensions are critical to consistent external ballistic performance and are held constant to within 0.005 mm (0.0002")
Meplat Diameter:	0.06"	1.650 mm
Min Bullet Protrusion:	0.45"	11.330 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:	0.67"	17.000 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:	12.9" / 327 mm or tighter	51.5 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:	14.0" / 345 mm	54.3 Cal. in length	General hunting twist for average distances to 330 yards or 310 m. A tighter twist (smaller number) can be used.
Minimum Twist:	15" / 381 mm	60.0 Calibers in length	The twist required for stable flight and good terminal performance further than 330 yds or 310 m. See the 'Notes' hereunder.
Minimum Impact Speed:	1600fps to 1700fps	488 m/s to 518 m/s	At this impact speed, the bullet will open to at least double caliber.
Calculated Ballistic Coefficient - G1 profile
BC = 0.245	Maximum to 3200 fps	Maximum to 975 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 = 0.201	3200 fps to 1600 fps	975 m/s to 488 m/s
BC = 0.187	1600 fps to 0 fps	488 m/s to 0 m/s
Suitable Cartridges, with consideration of the above specifications:

250 Savage


NOTES
A Gyroscopic Stability (Sg) greater than 1.1 is required for stable flight with HV and HP bullets. For hunting under 330yds/310m, 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.