Make some bullets from linotype & see how they do. We can speculate forever but no two guns are the same and what should work fine sometimes doesn't . sometimes things work great that shouldn't work at all. Or cheat, install gas checks and it's unlikely you'll get leading if they're generally sized properly. Like I mentioned before on this thread, I load and shoot lots of 454 casull every year, never bother with anything harder than 15 bhn, zero leading - those are gas checked 360 grain (bought bullets) running between 1400- 1600 fps (1600 is an estimate, from a 10 " barrel VS the 5" barrel I developed the load with). Works for me, may not work for you. Any idea what size your chamber throats and bore diameter are?
Even if you do get leading, it's easy to remove.