I tried the 200gr Shockwaves today. They are actually pretty pleasant over 2 pellets of 777. I was surprised at how mild. Much less than a .30-06 in a M700.
I got 13rds downrange in 2hrs, as this was my first time out with this gun. I was taking my time and being extra cautious as I've only shot a couple of old-timey muzzleloaders before. I was still trying to figure out if I needed to use a wet patch, dry patch, etc between shots. I got the first 6 shots downrange just using a dry patch and no lube on the sabots, then I had to get a bit of water for swabbing as the sabots became very difficult to seat. I think I'm going to try some bore-butter next time.
Accuracy was OK, and I was spending extra time sighting-in and checking out this Tasco World Class scope between shots with my bore-sighter. I need to sort the scope out, but I think this load will be the one I settle on, if it will shoot reasonable groups @100yds.
I swapped the 180xtps at the store for another box of these 200gr Shockwaves.