If going cast bullets and casting my own I would be using RanchDog molds for the bullets. Great designs and data to go along with them. Ranch Dog does his work and knows how to get the top performance from his bullets and loads.
Thanks for your kind words, Sir. I'm just a guy that likes fiddling with reloading!
Ranchdog, what powder are you using to push the 190 gr to 1600 fps? And what measurements if you would share. I'm currently loading some 200 gr gas check bullets with unique (subsonic) but have wondered what they would do full power.
15.0-grains of Lil'Gun, my favorite powder for short cartridge rifles. Remember that bullets of similar weight might not share the same length; that changes the pressure generated. I'm using my TLC357-190-RF. Other bullets, even cast, can be longer or shorter, which will affect the pressure. Also, notice my alloy mix of 60% linotype & 40% WW delivers a lighter bullet. With a water quench after the drop, the bullets are tough (29 BHN). Here are the specifics of the cartridge.
So, I look at the barrel of my 454 Casull and the values that the cartridge is loaded to. The Model 92 is a strong action. The 454's steel isn't any different than any of the other Rossi's and the barrel stock does have a bit more meat to it in that it only has a .355" hole drilled through it. I know that the alloy is good to 44K PSI, so I slowly worked it up to that pressure. Holy Moly...
1785 FPM! It is also a lesson as to just how volatile short cartridge rifle/handgun powders can be. .5-grains (point five)
raised the pressure 9K PSI! I'm offering this as a warning, not as a recommendation.