So, from what I understand a bullseye means the egg is fertile? I

kel bullseyeDesned to deliver a quick, dependable visual hit indication at any range, the Allen® EZ Aim® Adhesive Bullseye Target 12The 231 is cleaner burning that Bullseye. Both nite easily and are well behaved for lht loads. 231 is supposed to be a little slower than Bullseye.