I use the 300 gr. SST and have never had a problem. Theyhave the hard tips. This year I had a good kill on a spike with good expansion at a distance of about 60 yds. However, I had a problem with a six point buck and a 300 gr. STP. This bullet didn't open up; no expansion at all. The shot was at about 75 to 80 yds.

Interesting report.