I read some real good reviews which lead me to purchase a few hundred 178's for my AR10 after reading people having tighter groups with this round than the SMK in 175 which is what I had planned on using. I'm hearing a couple negative things about the A-max rounds in the lighter weights and I'm wondering if it's the lighter weights specifically or the A-max design as a whole. So, feel free to chime in.. good or bad.