The heaviest cast bullets I'm aware of for the .44 are 340gr. and they aren't common.

Veral Smith will make you any bullet weight mould you want, however there is an advantage to shooting paper patched bullets. There is no velocity limitation and no leading with proper loads. Too, with a paper patched bullet, you can make the bullets as hard and/or brittle or as homogenous as you want. In the lower velocity relms, pure lead with just a touch of tin works fine, too, yet are ductile and don't break up.

Plain-based bullets can usually be made to shoot well with the use of a heavy card wad underneath the bullet. We've even seated gas checks upsidedown underneath the bullet with good results.

Annealed and re-sized, .44 revolver and rifle gas checks will also be useable in the .404.

There is no comparrison between shotoing jacketed and cast. When all is said and done, cost wise, cast is always cheaper considering the very high price of bullets. A mould can be free after as few as 100 bullets have been cast.