What is the purpose of the ammunition you intend to load?
I don't have experience with Sport Pistol; but, I have a lot of experience with Power Pistol. Judging by Alliant's description, I would guess that Sport Pistol's burn rate is a good deal faster than Power Pistol. If such is the case, I doubt if it'll do whatever your intended purpose is - assuming your use of Power Pistol is proper.
180 grain bullets are "heavy for caliber," as the expression goes. Using Sport Pistol may indicate dropping to a 165. Again, speculating at bit.
I know that Alliant sure wants us all to buy Sport Pistol. They are definitely pushing it. I believe it is available at my LGS's too (but so is PP). It's probably economical to produce, so the profit margin is broad. Just a guess.
