I bought one of the Lee 310s(my first aluminum mold) after using my Lyman 429421 for most of my life but, the added expense of the gas checks and problems with getting builets to fill out completely with the Lee keeps me going back to the Lyman mold? I've tried adding tin to my alloy, adjusting the temp on my furnace(both up and down) without much success. I get several out of a potfull that are just too small at the base to hold gas checks? I ended up buying a quantity commercially, to get enough good ones to test thouroughly? Yet, I haven't given up on the Lee RF mold completely, if I hold my tounge just right, now and then, I get enough to play with? I must say, I do like the Lee mold design(at least the commercial cast I bought from Montana Bullet Works), just something in my casting techniques that doesn't allow me to cast good ones?
Steve
Hi S.B.
,
It could be one thing or another.
#1 I suspect the mold isn't hot enough.
It shouldn't take too very long for the aluminum mold(s) to get hot.
I lay mine on the rim of the Lee lead pot,go in have a Pepsi,Dr Pepper,tea,and/or have a bad habit.
When ready,most of the time,bullets comes out pretty good.
I try to direct the lead as direct into the sprue hole as I can get.
My mold for the 44 mag,the first one I bought from SSK Industries,is aluminum.(320gr JDJ design)
That was back in the 80s.Made by NEI.
I do have the Lee 255gr,500gr.
My only other mold is iron.It's the 270gr SAA for my 45 Colt(s).
When I started,it was a hit-or-miss.No 'puters,no net.
I'd say,the tin can be discounted.
For the very last,Murphy's Law......
Don't give up on the Lee mold. I've cranked out quite a few good bullets.
My best to you.