UPDATE....I went out to my Uncles farm this morning, temp around 54 and wind 12-15 with gusts out of the North. Shooting straight into the wind. I had loaded up tubes of 80, 90, and 100gr of Blackhorn. Using my favorites, 300gr Barnes MZ Expander with Crushed Rib sabots, and new Winchester W209 primers. The Remington Kleen Bore primers would not ignite which didn't surprise me after reading other posts and their web site. All shot at 50 yards. The middle target was with the 80gr.#1 shot was on a clean barrel. Black dot to lower left was 90gr. I can only shoot to 50 yards out there so I'll need to travel to the sportsman club 1.5 hours away to go out to 100+. Anyhow clean up was good, 5 patches with Hoppes #9 and two dry patches and clean. I think the 90gr is the clear winner. 100gr wasn't impressive, I think 90gr is the sweet spot with that bullet/sabot combo. Next time out I will pop a couple of primers before loading to see where the first shot hits. Other than that I'm happy with the Blackhorn. I don't think I'll be using it for target practice ($$$)but it should make a excellent powder to hunt with and not have to worry about cleaning right away.