wsf in the 357 magnum

[xandi]

I picked up a pound of wsf this week end, to load some easy going range ammo.
Would it be safe to use the 38 super p+ load data for a 124 fmj, in a 125xtp 357 mag load?
I want to use 6.5 grains with a cci no.400 srp
It has a 34.6 kpsi with the max charge of 6.6 grains in 38 super p+ that well under the max for my 357 right?

[xandi]

I do have cci spp too btw

[Crashbox]

I've used WSF in my Ruger SP101 .357 Magnum, approximately 7.5 to 8.0 grains under a cast 140-grain TCFP bullet. It shot just fine but the muzzle report was notably louder than the equivalent load of Herco which was my normal powder, so I didn't pursue further research.

I'd say 6.5 grains of WSF under a 125 jacketed bullet should be fine, although the small rifle primers might be an issue. The SPP should work well.