I'm rocking enanthate with a propionate kick start and I feel absolutely no pip or sting on any kind. I've been hearing that prop is susposed to kick like a mule due to concentration. I'm rocking 1cc every other day. Now my gear is from a company that seems to have 2 different boxes. One has circles (what I got) and the other has hexagrams molecules. Both have holograms on bottle and box but I'm a little concerned about authenticity. I'm one week in mind you. Any ideas or is not getting a pip from prop normal.