The bores in those rifles vary all over the place. Thanks to some advice from a friend in Summerland, I found that 9mm cast bullets worked just fine.
Another thing that worked well, after slugging the bore to see what the diameters were, was to use 158gr round nose cast and using my press, swage them down to .353 diameter through a tapered sleeve, made up from and old sizing die. Takes a bit more time but very cheap and the bulk cast bullets available from the local shop, which were already lubed slipped through easily. Couple of hundred an hour is easy.
$10 for the die out of a box of misc die parts and a few minutes on the lathe and all was well. If you don't have a lathe, a local machine shop will turn it down cheaper than a new mold or maybe a bud with a lathe will do it for a case of beer.