The max length that will fit in the mag is 2.260" The most common COL for loading an AR is 2.250". The problem with these bullets, is there is no tested load data for them yet. That was my second call to Barnes to pick their brains about this bullet. I think I may do a ladder test with the same loads but different COL.
Lock and load, the zombies (democrats) are coming (to take your guns)!