First off, I love working the color shifting pearls with this bait and will shoot up maybe 50 at a time to have plenty on hand to play with. Some will have chartreuse tails, some solid black.
On the dents, when I am shooting to have these to play with I don't work about dents, color is my objective yet if I am making these for a friend I don't want dents and generally shoot the plastic at a cooler temperature, and make certain to top off the sprue. I have a few of the early prototype molds that had smaller gates between the bait and the sprue when dealt me fits with dents and those I have used the Dremel and opened the gate areas up a bit to help eliminate denting by allowing more volume to stay in the gate in a liquid state longer. It takes very little material to be removed to almost eliminate the denting issue, but I'd try injecting at around 320 degrees, maybe even 310 as long as you're doing a single color body. The molds will heat up fairly fast too if you're moving the injection process right along and that can also affect the denting likelihood. Dents can be conquered but since everyone does things a bit different from each other and plastics and injectors can vary, there's curve to figuring it out.
I have noted that white can be the worse color for dents and I attribute that to the huge amount of heavy pigment that makes the color. The titanium white used weighs a lot and is denser than many other colors and due to that I think it dissipates heat way different than other colors do. I struggle with white bodies in this bait and won't make them any more.
I'd start with a lower injection temperature, then start poking into other ideas.
