Miwallcorp is my go to spot for this ammo.
Hornady Ammunition 300 Blackout 110 Grain GMX TAP - 200 Rounds - CASE
The 300 Blackout TAP® offers excellent barrier performance from 6.75 - 16" barreled rifles. The monolithic copper alloy bullet design fouls less than pure copper bullets while maintaining accuracy and consistent terminal performance. The 300 Blackout TAP® is the absolute optimum choice for patrol rifles in 300 Blackout.