Plain and simple,does m855 suck? I understand the improved penetration on a steel helmet at 600 yds,I chose m193 as my bulk/shtf/practice round due to the extended fragmentation range vs m855,less fleet yaw variation due to bullet composition,cheaper price,and same POA/POI as my 55 gr 5.56 GMX,is it really worth me spending a lot of money to stock up on something that offers spotty performance and sucks through the FBI barrier tests?