BCall
03-15-2009, 12:12 AM
I have bought several new 22 and 6mm molds over the last few weeks, and I really wanted to be able to cast some nice boolits with them. To date, I have had alot of frustration, and few good boolits. Today, I read through Speedcasting by Bruce B, and then I tried it when I continued to have problems with the new molds. I would start casting, get some bad ones, then get a few really nice ones, and then the bases would go bad. In previous pictures, members said they looked porous, but i thought they were just tearing. Being new, I kept decreasing flow until the melt barely came out-but the bases looked the same. In trying to figure out why and how to fix it, I let the mold set longer-bingo, clean cut base, and the boolits were sticking in the mold less. Apparently, I am not letting the sprue cool enough before casting. Then I thought-I'm not looking for speed, but quicker cooling of the sprue might help, and bingo again, I was very happy with my results. After I started getting good boolits, I started water quencing them, , and started speeding up a little. This might not work for everything I do, but with these small molds, it made me very happy. I selected five at random after i was done, and before i sorted for the pics. The second one from the left had a rounded base, but I have now discovered that after cutting the sprue, i can check the base, and if it is rounded at all, i can see it and dump it away from the good ones. This is a single cavity, so I can kinda presort the bases while I cast. I am a much happier caster now. Thanks to all for everything, Billy
http://i258.photobucket.com/albums/hh259/blcall/SN850404.jpg
http://i258.photobucket.com/albums/hh259/blcall/SN850405.jpg
Second pic didn't turn out so good, but the bases are the best I've cast so far. They all look a little rounded, but they are not, just how the picture came out i guess. Might try another one later. Thanks!
http://i258.photobucket.com/albums/hh259/blcall/SN850404.jpg
http://i258.photobucket.com/albums/hh259/blcall/SN850405.jpg
Second pic didn't turn out so good, but the bases are the best I've cast so far. They all look a little rounded, but they are not, just how the picture came out i guess. Might try another one later. Thanks!