Looking for a general idea of velocity with Benchmark

[CXRs]

I accidentally entered the wrong benchmark volume for SST123. I was using 26.8 not 28.6. It's been edited in my OP. I've been using the Hornady Reloading Manual X. Dont have a Chrono yet...hopefully for Father's Day

Ah, I was thinking that sounded a bit high. I'm in the same boat, I've just been calculating based on ambient conditions and drop at 2/300.