100% agreed with this!!
What you need to do is simply just cast or better yet heat cycle the mold a few times. Then use proper heat on mold before tou expect good bullets from it. Another issue cannbe cleanly ness. I always advise people
To buy brake cleaner and literally hose out the mold. It will remove any oils they could cause issue to the quality of the bullets.
All molds are different some cast straight away others are as we are describing and require use (or heat cycling) to creat good bullets. But bottom Line is proper heat of the mold. (Get a hot plate and use it!)
CW