Lapua’s Lock Base bullet is a Lapua innovation which combines a full metal jacket and boat tail with a patented base design. This rifle bullet is suitable for mid-range and long range shooting and it has proven its worth in sport shooting arenas as well as military and law enforcement applications over time. CaliberProd. no. Bullet diameterProduct codeWeightTypeBullet nameBallistic coefficient BC G1Ballistic coefficient BC G7 mmin ggrs .304 PL/HL 70917.83.308B4669.7150FMJBTLock Base0.4340.217 4 PL/HL 70867.83.308B47611.0170FMJBTLock Base0.4980.249.3384 PL/HL 80128.60.338B40816.2250FMJBTLock Base0.6250.310 Lapua .338 cal 250gr Lock Base FMJBT 500 Pack 4HL8012