Published pellet BCs are normally GA-model figures, and pellet BC swings hard with speed — the same pellet can measure 0.012 at 1100 fps and 0.034 near 650 fps. This app converts GA to G1 with a form factor, but treat any pellet BC as a starting point and true it against your own chronograph.
Humane Kill Range
⚠ Small Game (Squirrel / Rabbit)
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Minimum 4.0 ft·lbf for humane harvest.
E @ Zero
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ft·lbf
E @ Max
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ft·lbf
Rifle Setup5.56
Federal XM193 55gr FMJ (M193) Solving on G1 at BC 0.243 · G1 - flat-base bullet; G1 is the correct reference shape · no G7 figure for this bullet
Service-rifle and gas-gun match shooters solve the 75-77gr OTM boat-tails on G7; flat-base FMJ and V-MAX stay on G1.
Muzzle velocity 3054 fps (estimated from barrel length) Stability factor Sg 3.71 - stable Solving with spin drift, aerodynamic jump and Coriolis
Paste a measured Cd vs Mach table, one
Mach Cd pair per line. Lapua .drg files, Warner Tool
Flat Line tables and Barnes Doppler data paste in directly; comma
decimals and header lines are handled. A CDM is the bullet's own
measured drag, so it replaces the BC entirely rather than scaling a
standard shape. No measured tables ship with this app —
manufacturers release their Doppler data under their own terms.
No imported drag models yet.
Cartridge default for 5.56 NATO. Type a value to pin your own.
Holds stay inside ±3.98" of the line of sight out to 307 yd — up 3.98" at 150 yd, down 3.98" at 306 yd. Solved for a target 8 in across with a 1.5 in sight height. This load stays worth shooting to about 514 yd (transonic), so the target size closes the corridor first.
Barrel Angle vs LOS
+upward from LOS
0.109° / 6.5 MOA
Velocity & Energy
Muzzle Velocity
Adjusted for barrel length
3087fps
Muzzle Energy
1164ft·lbf
1.0 fps/°F (cartridge default) at 92°F → +22 fps vs the 70°F reference.