My TL3 will single feed fine with my match calibers. For 223 I can't single feed unless i guide the round into the chamber by hand. If I just throw it loose and close the bolt the nose of the case hits the breech face of the barrel rather than the chamber.
What you're describing is the same issue. It's not anything to do with CRF vs Push feed, it's just the geometry of your case/bullet plus the magazine causes the point of the bullet to hit the flat end of the barrel rather than going into the chamber.
Might be due to the height the magazine sits at or the angle of approach against the feed ramp of the action. You can experiment to see where the nose of the bullet is going (too high vs too low vs left/right) and see if any change in technique can get it to feed. If it's hitting too high you might try closing the bolt more slowly, or if it's hitting too low you could try placing the case all the way back and then closing the bolt more quickly so that it jumps up the feed ramp and into the chamber. Just some ideas to try out to see if you can get it to run.