I don't know about conicals specifically, but I know my T/C Encore 209x50 wouldn't shoot any load in the Encore manual worth a crap. I was about to get rid of the gun until I talked with someone at Precision Bullets about my problem. He recommended two of their heavier .50 cal. bullets (a 300 gr. spire point and a 330 gr. HP, both with sabots.) Without changing ANYTHING else, my gun went from shooting tumbling bullets that might not hit a 4' x 4' target holder at 100 yards, to 3 inch groups at 100 yards. Since then, I have found other bullets, all in the 300 + gr. weight which are also longer than the lighter bullets that shoot equally well in my Encore. Apparently T/C barrels can be very finicky about what they will shoot, and inconsistent from one gun to another as well. My gun prefers heavier and longer bullets. My gun also has the QLA feature. I suspect the barrels on the Encore, Omega and Triumph are the same.