obviously you should start testing your reloads with a slightly reduced powder charge,
Id start 3-4 grains lower than you think the manual shows just to be safe and test,
and load 5, cartridges, and check before stepping up one grain at a time, for the next 5 test cartridges,
but its been my experience the marginally larger cast bullet provides no problem
with pressure or accuracy,
but ID point out I use a moly/bees wax , bullet lube and gas check design not powder coated projectiles
the difference should be minor/marginal but test
most cast bullet loads are operating at far lower pressure than similar jacketed bullet loads produce.
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