I needed some Lyman 31141 bullets to try in my 788 but my only mold is a single cavity. It was a nice cool day and I cast about 60 of them. This mold cast like a dream, bullets fall out as soon as I open the mold. Did not even have to refill the pot. It was a enjoyable casting session.
Well my casting mentor friend and gunsmith said to me, if you have a single cavity mold you don’t have to worry about minor differences between the two cavities, so right from the start that problem is out of the way.
Iirc my rifle molds are almost all double cavities but that’s because of what I find. Pistol bullet molds are doubles or bigger. No more giant brass molds ordered by me.
This is my first post after stumbling in from an internet search of a topic. I like the site very much especially Glen’s bench.
"Well my casting mentor friend and gunsmith said to me, if you have a single cavity mold you don’t have to worry about minor differences between the two cavities, so right from the start that problem is out of the way." ...Tom W
Exactly right, but it is a bit like pulling teeth, or better, watching paint dry!
Single cavity casting marathon Sunday. Started around 9:30 AM..mixed up batch of 25-1 lead-tin alloy & began with a custom Sabonis .32 200gr. tapered for breech-seating. Next was a Saeco # 732 200gr. tapered .32. Then tried both moulds with 20-1 alloy. Finally cleaned up around 6:30PM...Woke up next morning wondering why upper left arm was kind of sore? Any way, should be off to a good start for next years shooting!
I don't mind casting a sing cav mold for large rifle bullets like for 375H&H and 45-70, and maybe 100 or so for 45 colt. They at least look like you
are casting something. Casting 22s in a single cav is like nuts IMO.
To the Hotel California of bullet casting you may have stumbled in but its going to be hard to leave ..this site is a black hole for sure BL most of my molds have multiple holes 'cause that's the way they came.. but I generally single cast for better control over mold temp and because I PB'd so many of them ,I do have a Lyman Ideal 4 cav. 311467 that's a chunk of iron I find it's no problem to cast a couple hundred at a whack that senough to visually and weight sort. Dan S.
I’m with Paul. I don’t mind casting slugs in single cavity, but even there I use two mounds. When all I had were double cavity I used two. I cast most often with four cavity , and really enjoy NOE’s RG series.