I have a new T/C Omega and have decided to try the T/C shockwave bullets in the 250 gr. 5 of these bullets came with the gun and I bought 3 more boxes. When I got home I saw the ones that came with the gun had a yellow tip, the ones I bought had a blue tip. Is there a difference in the two other than the color and if there is what is it. thanks for your time and responds. Mike