I can’t speak to trajectory, but I can speak to the on target lethality of the Knight Bloodlines. I’ve taken deer with three types of muzzleloader bullets: 1) Barnes TEZ 250 grain 2) Barnes MZ Expander (250 grain) and 3) Knight Bloodlines (220/250/275 grain). I also harvested a doe this past season with a Barnes TEZ doppelgänger in the form of the Federal Trophy Copper 300 grain slug. In my experience, given similar shot placement, the Bloodline bullets harvested the deer more quickly, with less travel from the place of impact, as compared to all of the Barnes/Barnes imitator. I had one Barnes (250 grain MZ Expander) not pass through, and one of the 220 grain Bloodline bases did not pass through on a quartering to shot. Otherwise, the base of the Bloodlines have always passed through the deer. There has also been more bloodshot meat with the Barnes bullets, when the shoulders were struck.
Next, my neighbor, who has been muzzleloader hunting much longer than me, who was a lifelong SST (or TC equivalent) shooter, converted to Bloodlines after hearing me shoot one time, and call back to my house on the walkie for evac not long after the shot, time after time. Since then, he has not had to track a single deer, or ask me to help him track one.
Finally, I now have ~350 275 grain Bloodlines stored up for use, which will likely last me for the rest of my life (especially if we get raptured out of here soon). I believe in the performance of these bullets, and my rifle shoots the 275 grainers the best.