About 4 weeks ago I finally got my first high quality mold. It is an NOE 432-265-RF RD mold in the RG2 configuration. When I first got the mold I cleaned out the cavities with white gas, heat cycled it three times, ran a toothpick around the edges, smoked it and lubed it. Then I was off casting some boolits. Both cavities stuck a bit but hay it's new.
Now after I've cast 800-1000 boolits out of it it still sticks, sometimes bad enough that I'm afraid I'm gonna bend or break the hp pin. Before each casting session I relube the sprue and pins, I run a toothpick around the edges of the cavities and resmoke the cavities. I have tried to lightly scrub the cavities with comet as well.
When I first start casting the boolits fall out nice and easy with a gentle shake. After 8 or 10 cycles they start to stick pretty bad, by this time I have to give it a couple of whacks on the handle. By the time I have gotten to 20 or so cycles I almost have to pry one cavity out. I then have to knock off some burs on the top edge of the first cavity. (closest one to the sprue screw) then the cycle repeats itself again.
Please help I don't want to destroy such a beautiful work of art and I feel that is exactly what will happen unless I figure out how to stop this!!!!