My wife gave me my birthday present two months and 3 days early, a used Lyman Mag 25 bottom pour pot. I tapped a dowel rod to the lift handle , the other end of the dowel sits on the top of my shoe. I can now cast on my own. Though my wife and I will still do cast date night using open pot here and their.
Compared to the results of what my wife and I get using the open pot, the results of my first six hour solo cast session with this bottom pour pot was disappointing.
Doing the force feed like I am use to with the open pot yielded nice bullets but the area around the lead nipple kept getting filled with over pour and cooling down the nipple and stooping the lead flow. So I watched a YouTube video that talked about free fall flow. I tried that method for almost five hours and could not get the base of the bullets to fill out.
I am using Lyman #2 alloy and have the pot set to 750 deg I used the following moulds today. I warmed the mould on a hot plate to get them to temp first.
RCBS 308-165-SIL forced feed excellent bullets but could only fill front cavity of the 2 cav mould. Same with free fall.
RCBS 6.5--140-SILH Forced feed excellent results. Gravity feed Occasional good results. But I could not figure out what I was doing differently.
RCBS-257-120-SP new mould did temp break in like NOE recommends. Used mould for at end of casting sesion.. Gravity feed no luck.
RCBS-257-120-SP used mould forced feed good and better results of gravity feed on all of the moulds today.
Lyman 375449 new mould did temp break in like NOE recommends. Forced feed and gravity feed proved a problem with this mould. It is a big 375 cal bullet for the 38-55WCF
Lyman 257420 new mould did temp break in like NOE recommends. It casted real good bullets with forced feed but I could only used 1 cavity of the two. Gravity feed at least filled out the bullet but the base was incomplete.
Lyman 266673 new mould did temp break in like NOE recommends. Wash the mould first and dry then I do those three heat and let it cool rotations I have the mould closed and sprue in casting position. For some reason this mould was the devil to open after its third cool down so I could suit it and then use it. Once I got it open I could not get it to close with out leaving a line of day light between both half. I get to call Lyman about it.
I got a lot of learning to do with this bottom pour pot, but I do not have to wait for my wife to have time to cast now to get cast bullets casted. I casted for the five hours and did not burn my self with lead at all.
I tried finding a video of the gravity pour method up close showing nipple and mould opening in progress. One problem I do think I was having is my sprue puddle while present ( i could see the lead being sucked in as sprue condensed to solid) might not have been tall enough. But when I let the stream pore on the mould it would just sail over the moulds edge, leaving the same size in height sprue puddle.
as early birthday presents go, this is the best.
GOD, United States of America, US Marine Corps, Family, Self