I´m about to buy a second hand Feinwerkbau History no1 percussion pistol.

Since I already have casting pot, I´d like to cast balls for this pistol too.

Feinwerkbau manual states to use .362 roundball with 0.3mm thick patch.
Only .362 RB mould I have found (that has at least two cavities and sprue cutter) is Pedersoli.

Lee has two moulds that make .360 roundballs:
double cavity mould (sku 90418) and
18-cavity 000 buckshot mould (sku 90192).
Making 18 balls in one pour sure sounds tempting after casting hundreds of .330 balls for Siber with single cavity mould..

Have you tried how well those 0.002" undersized balls work in History no1 pistol?
They´ll need thicker patch, but are they just too small?

I placed a wtb- add in the wanted section. Looking for Pedersoli- or Lee buckshot mould.