I am loading 10mm for the first time... for my father that lives in another state.

I have some mixed once fired brass, a pound of longshot and some Gallant 200 grain coated round nose flat points

With this tread and other research, I am thinking that 7.5 grains of LS loaded to 1.26" COAL would be a safe general load. It shows as max with Hodgdon data with a similar bullet but I am seeing folks that take cast bullets up to 8.5 grains.

Not looking for bear buster ammo. Just range ammo around 1100ish fps. But I plan on loading 800+ rounds without being able to test the in the DW(s) he will be shooting them in.

Does anyone see an issue with a general load of 7.5 grain LS load with 200 coated cast?

Semper Fi