.220 Swift

Condition Parameters
ICAO standard atmosphere
Drag function: Spitzer-B
Recoil for this round is 3.31 ft. lbs.

Muzzle Velocity BC Height of sights Angle of departure Atmosphere Rel. Density Temp(°F) Range of Zero (Y)
4274 0.221 1.5 3.873 0.076474 59 325
.220 Swift case (from Accurate Powders)
My .220 Swift is a fantastic rifle and when paired with a Springfield Armory 4-14X tactical scope it is truly an amazing firearm. The ballistics shown below are the result of a year of hard work to perfect a load for my Ruger No.1. The result is a load with only 9 fps standard deviation (S.D.) and phenomenal accuracy (0.86 MOA [2.6" group at 300 yds.]). The load uses CCI BR-2 (Benchrest) primers and 42.0 grains of Varget powder behind a 40gr. Nosler CT Moly-coated bullet.

Note: All velocities were measured using an Oehler model 33 Chronograph. Ballistics were calculated using Ballis-tec software.

Exterior Ballistics

Range(Y) Height Deflection(in.) Velocity(fps) Time of travel(sec.) W1 FP
0 -1.5 0.0 4274 0.000 1.726 1626.428
50 0.3 0.0 4092 0.036 1.652 1490.770
100 1.7 0.0 3908 0.073 1.578 1359.629
150 2.5 0.0 3724 0.113 1.504 1234.529
200 2.7 0.0 3540 0.154 1.430 1115.470
250 2.3 0.0 3358 0.198 1.356 1003.646
300 1.0 0.0 3165 0.243 1.278 891.519
350 -1.3 0.0 2956 0.293 1.194 777.590
400 -4.7 0.0 2766 0.345 1.117 680.778
450 -9.6 0.0 2585 0.401 1.044 594.540
500 -16.2 0.0 2405 0.461 0.971 514.572

Maximum range of projectile in a vaccuum (space) : 36,534.15 Y
Retardation of projectile in air : 6,318.40 fs/sec
Pressure (or resistance) on the meplat : 196.46 lbs.
Calculated Effective Ballistic coefficient : 0.239

Terminal Ballistics
 Optimum Game Weight (OGW): 187 lbs.
Reported sectional density: 0.114
Calculated effective sectional density: 0.118
Forward Momentum rating (FM) : 0.760
Ballistic Efficiency Index of this round out to 500Y = 34.20