The Hammer Hunter™ line is our long range or high bc line of bullets. This was the original line of bullets. These bullets all have 1.5mm hollow point and are typically 60%-70% weight retention. There is no drop off in terminal performance from the Shock Hammers. The only difference that we see on game is the Shock Hammer™ will open up slightly quicker. We designed the Hammer Hunter™ with the 1.5mm hp as it was the smallest that we could get reliable expansion. We tried 1mm hp but it would not always do what we wanted on game. Failure is not an option. As far as we know there is no report of a failure of the Hammer Hunter™ to expand on game. There is always that chance and the larger hollow point on the Shock Hammers reduces that risk.