We conducted field and laboratory trials to evaluate a new biobullet d
elivery system for wildlife management. During field trials on white-t
ailed deer (Odocoileus virginianus) we determined the terminal velocit
y (146 m/sec) necessary for acceptable biobullet delivery. Consistent
projectile penetration was achieved with a pressure setting of 450 psi
when 3 m from the deer and 540-550 psi at 20 m. Acceptable penetratio
n was based on recovery of placebo biobullets or silicone implants fro
m deer shot previously. Laboratory calibration trials established the
pressure settings required for acceptable penetration at a given dista
nce within the limitations of the delivery system. After determining t
he appropriate biobullet terminal velocity for a particular species, p
ressure settings can be calculated for delivery at a selected distance
.