I’m looking on a burn rate chart and Norma 204 falls in between IMR4350 and H 4350, which is going to still be a little too fast burning for that 230gr bullet.

Barnes lists data for their 110gr and 130gr bullets with H4350, but they dont have any load data for their 120gr bullet yet. This is where it gets tricky, and this is what I would do ( but you are not me so take this however you want). I would look at the starting loads for H4350 for both the 110 and 130, split the difference, and use that as my starting point for Norma204 with the 120gr. Hope this helps at least a little.




JTD