I've been shooting the 300 TSX-FN for awhile now. I use H4198 to give me 2,000 ft/sec in a Starline case. I have shot many 100yds groups that came in under 1". The 300 TSX flew right through every deer out to 100yds, which was my farthest kill with this bullet. A 300lb bear managed to stop one after it went through his shoulder and lodged into his spine. The bullet was expanded just like all the photos except that one of the petals had sheared off. The Barnes 300 TSX is an excellent bullet in the 45-70.