Today's NBTs seem to perform better than the earlier ones. They were always accurate in my 270 but the earlier ones did seem to fragment more anddid a lot of damage possibly because of the jacket design or whatever. The 'newer' ones tend to hold together a little better. I've taken a good bunch of deer with this bullet and only once did I have trouble (bullet seemed to disentegrate on impact). But this could have been a faulty one that slipped through.