HEAT rounds

Lert:   An easily underestimated one. Your shiny 300mm pen APCR shell could have ~220 left over at 500 meters, but your 350 pen HEAT shell will still have 350.   Ofcourse, destructible walls, spaced armor and blades of grass detonate HEAT shells prematurely, but if you can land a shot on a relatively flat piece of armor, HEAT will go through at any range.