Why most of the very early Ideals and Lymans moulds were single cavity? It couldn't have been any more difficult to machine up a larger set of blocks & sink another cherry into them? Then I came across some information in some early handloading books, including the early Ideal handbooks. The Schutzen shooters usually only cast up enough bullets for a match, as they believed any oxidation would degrade accuracy..these guys were pretty fussy about all points of loading and shooting..then too, a portable hand cranked lube pump was often used right at the range..lubing only enough for use at the match. I have read where hunters would only cast up a few dozen at the most for sight-in and hunting...no wonder the mould makers didn't see the need for any extra work. But there are alot of S.C. wadcutter moulds out there..I have a hollow base Ideal #358395...designed by Ed Mcgivern..this one is slow with it's seperate H.B. pin. and there were lots of handgun leagues going on in the early years. I guess with no TV..heck..probably no radio for that matter..those nights got pretty long.