I am not seeing much, if any, price difference between plated bullets and good lead bullets\. I buy Berry's 124gr HBFP by the thousands for 8cents a piece including shipping. I can get nice hardcast lead bullets locally for the same price.
Besides leading, it comes down to what shoots the best with your gun. For my 9mm that means Berry's. For .380 I get about the same results with Berry's as lead so I shoot both about the same, depending on where I feel like shopping when I am running low. For .45, I get the best results with FMJ ball and LSWC. I seeing a bit more lead than I would like with the LSWC so I might try Berry's, but sometimes the results are worth the extra cleaning.
Your guns will tell you what they like if you listen