I do recall the part about hardness in the Lee manual.
What led (no pun) me to all this is the Missouri Bullet page:
Missouri Bullet Company
I have ordered from them several times and must say they are a great place to do business with. Anyway, I purchased some 240 gr LFP but I checked the wrong box. I meant to get the Keith style or the regular magnum bullets but instead I ordered the Cowboy #3 version which has a hardness of 12 as opposed to the magnum bullets with a BHN of 18.
I do load some 44 special and some wimpy 44 Mags. so maybe these will be the correct bullets for general plinking, target shooting.
However, I do like to load up some hot rounds now and then for that good old Magnum punch!
So do not know how fast I can push these.