Hodgdon has recently updated load data for 350 Legend.
https://www.hodgdonreloading.com/rel...c=true&type=54
Bullets up to 180 grains. 16 inch barrel. Winchester Small Rifle Primers.
Powders
4100
5744
No. 11FS
No. 9
Lil'Gun
IMR 4227
Enforcer
296
CFE BLK
I'm getting 1950 fps with a 200g RCBS over 21g of 11 FS, CCI Mag Primer, 16" barrel, which is more than I would expect so start low and work up.