I got the new Hornady catalog the other day and was looking at these. The chart in the catalog initially look pretty impressive but if you look closer, they have their new bullet starting in the neighborhood of 200 fps faster than a FP bullet. Thusly, the energy is higher downrange. The higher BC of this bullet does have a slight edge but for the normal use of the 30-30, 35, 45-70 etc. at ranges around 100 - 150 yds the difference is minimal.
I like Hornady bullets and use them alot but I don't think I'm gonna run out and buy these bullets so I can make my 35 Rem or 45-70long range rifles.