Part of the problem is 2 sets of specs for 44 mag . Pistol @ .429 & rifle @ .431 . Most commercial casters just size to .430 & that's it . Many of the newer Lyman moulds are cut undersize also . Unless you're going to buy mould(s) & cast you will pay more for .432 - .433 bullets . While a plain base bullet will work fit is king regardless & quality lube a must . Plain base if you get all that right + correct alloy to match pressure your pretty much limited to 1200 - 1300 fps . I shoot PB's out of all my magnum revolvers & they work just fine . Above those velocities a gascheck is worth the extra work / costs . All my cast rifle bullets are gaschecked because of increased velocity out the longer barrels .