GA MarshallIs this really the case or am I imagining something here?
You are imagining this, units do not always do full damage but the range is not a factor same as 'friendly fire' is not a factory when bombarding area your units still in.... sometimes I have seen a 'BUG' with one range unit that causes other range units of same type not fire at all, in this instance or if you suspect this is what happened in your situation, you can split your units of same type , eg 10 arty can be split 5x 2 to see if this is problem with damage...
Here is damage (Attack/Defense) cap spread sheet you might find helpful > Attack/Defense Values (Caps) https://docs.google.com/spreadsheets/d/1Xhuy2daC-RAWXd2Cw59GIpDrtHWL94-ZDG1NdPnCEic/pubhtml#