or possibly the lighter tougher faster bullet like the TSX will fail to exspand at speed. otherwise not performing as well as hunting balistic tip or heck id bett even core lokt would before better at close range.
this is just a hunch though. wouldnt small tough bullet punch through at the same speeds as say 165gr bullet easier. same bullet construction but less surface area causeing resintince against the bullet inside the animal.
on a side note. I love baliastic tip hunting bullets specifiacly noslers. but im also going to give the tsx a tryin a few calibers. if theyre acurate as all get out they may replace my hunting loads in my smaller rifles. if theyre the same then they may be used for tougher critters bigger than deer. if i fail to easily get acurate with them theyl be dropped faster than my girlfreind dumped me and that was fast and outa the blue.