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450220HV332 Technical Profile © Application: General Hunting

Barrel Bore Diameter: 0.442" 11.230 mm The diameter of the barrel from land to land.

Barrel Groove Diameter: 0.450" 11.430 mm The diameter of the barrel from groove to groove.

Bullet Weight: 220gr 14.3g Bullets are guaranteed to weigh within 0.25% of the stated weight.

Bullet Length: 0.84" 21.260 mm

Secant Ogive Length: 0.41" 10.470 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: 0.50" 12.670 mm Add the case length to these numbers to determine the maximum and minimum cartridge overall length (COL) that is possible with this bullet.

Max Bullet Protrusion: 0.67" 17.000 mm

Bullet conforms to CIP and SAAMI for magazine length. Case and COL based on:450 Bushmaster. Check the COL of your rifle for suitability with this bullet as described above.

Maximum M/V: 5500fps 1 676 m/s If the maximum muzzle speed is exceeded, dynamic stabilty problems may be encountered.

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.

Twist Rates are guidelines but the Minimum Twist must be observed

Twist: Sg = 1.4: 41.8" / 1062 mm or tighter 94.5 Calibers or tighter General hunting twist for average distances to 190 yards or 180 m. A tighter twist (smaller number) can be used.

Minimum Twist: 45" / 1143 mm 101.8 Calibers The slowest twist required for stable flight and good terminal performance further than 190 yds or 180 m. See 'Notes' below.

Calculated Ballistic Coefficient - Standard Metro G1 profile

BC = 0.160 Maximum M/V to 3550 fps Maximum M/V to 1 082 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 = 0.139 3550 fps to 1600 fps 1 082 m/s to 488 m/s

BC = 0.142 1600 fps to 0 fps 488 m/s to 0 m/s

Suitable Cartridges, with consideration of the above specifications:

450 Bushmaster

NOTES

A Gyroscopic Stability (Sg) greater than 1.1 is required for stable flight with HV and HP bullets. For hunting under 190yds/180m, an Sg of up to 1.4 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.

450220HV332 Technical Profile © Application: General Hunting

Barrel Bore Diameter:	0.442"	11.230 mm	The diameter of the barrel from land to land.
Barrel Groove Diameter:	0.450"	11.430 mm	The diameter of the barrel from groove to groove.
Bullet Weight:	220gr	14.3g	Bullets are guaranteed to weigh within 0.25% of the stated weight.
Bullet Length:	0.84"	21.260 mm
Secant Ogive Length:	0.41"	10.470 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:	0.50"	12.670 mm	Add the case length to these numbers to determine the maximum and minimum cartridge overall length (COL) that is possible with this bullet.
Max Bullet Protrusion:	0.67"	17.000 mm
Bullet conforms to CIP and SAAMI for magazine length. Case and COL based on:450 Bushmaster. Check the COL of your rifle for suitability with this bullet as described above.
Maximum M/V:	5500fps	1 676 m/s	If the maximum muzzle speed is exceeded, dynamic stabilty problems may be encountered.
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.
Twist Rates are guidelines but the Minimum Twist must be observed
Twist: Sg = 1.4:	41.8" / 1062 mm or tighter	94.5 Calibers or tighter	General hunting twist for average distances to 190 yards or 180 m. A tighter twist (smaller number) can be used.
Minimum Twist:	45" / 1143 mm	101.8 Calibers	The slowest twist required for stable flight and good terminal performance further than 190 yds or 180 m. See 'Notes' below.
Calculated Ballistic Coefficient - Standard Metro G1 profile
BC = 0.160	Maximum M/V to 3550 fps	Maximum M/V to 1 082 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 = 0.139	3550 fps to 1600 fps	1 082 m/s to 488 m/s
BC = 0.142	1600 fps to 0 fps	488 m/s to 0 m/s
Suitable Cartridges, with consideration of the above specifications:

450 Bushmaster


NOTES
A Gyroscopic Stability (Sg) greater than 1.1 is required for stable flight with HV and HP bullets. For hunting under 190yds/180m, an Sg of up to 1.4 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.