Not sure this is the best place to ask, but here goes. I pulled these two types of bullets from 1950's US military ammo. The first photo is the type with 2 cannelures. In the photo you can see a faint indication that the tip was originally painted, but not all of this type shows that faint indication. Bullet was seated to lower cannelure. The recess at the base is clean and ends with some slick metal, not lead. These weigh ~144 gr. The second photo is the type with 1 cannelure, but no indication of painted tip. Weight is ~141 gr. The base is a little different in that the recess opening is a little smaller diameter. The recess in each of these contains a yellow powdery substance. The powder is crusty and will not fall out, but it is easy to dig it out. Both of these types are much longer than you would think a lead core 144 gr bullet should be. Are these tracer bullets? Is that yellow powdery stuff supposed to be there?