No experience with the 220s but I suspect they were designed as a woods bullet for the 06 and 08. I have only shot the 160 6.5s at paper but they also get mixed reviews so no idea why. On the SSTs I have seen some where the interlok is almost non existent but haven't sectioned enough to see if this is the norm or an isolated case.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli