I'm having great success with Hornady's 68 BTHP Match... It's not poly-tipped, but it sure groups great on paper !
Waiting for the chance to try them out on the song-dogs.
Superior ballistics (.355 G1) to every other .223 bullet (of the same weight or less) available.
24.5 grains Varget @ 2.310 - 2.315" COAL, in a 1:9" twist barrel
YMMV