If that is the 358-125 PC, I have the same mold. They look like they might be the 358-130 PC. Difference being the latter has a rounded nose. So, far I've been happy with mine if I PC them, but haven't gotten Hi-tek to work yet. Only tried once and it ended up horrible.
That said, I noticed in your photo, you have one that has the tiniest void in it:
Image I find those really easy to get with this mold and with my 359-147 MP mold- which has grooves, btw.
Any thought on what causes those? They usually are much deeper for me. I've found the best way to prevent them is a melt temp around 750 and to always start pouring at the furthest cavity.