I know that a lower halo is a good tube spec and the military also prizes tubes with low halos but i have heard that a VERY low halo can cause problems when subjected to heavy recoil...now im assuming it depends on the caliber...like a low halo of say .67 would probobly be OK with 5.56 recoil but with heavier recoils like 308 it can cause the micorplate chanel to vibrate into the photcathod...

what say you guys?

also if this is true would a low halo tube basicaly be more fragile then a higher halo tube????