Congratulations on the 22-250, they are great fun.
The load du jour is 52gr A-max under 33.3gr of IMR3031. Best group is 3/8" for 5 shots at 100yds.
I tried Varget but my rifle did not like any load that I tried.
I have not chronographed my 22-250 at all.
My rifle is a Turkish Mauser crafted entirely by myself and fitted with a Remington 700 barrel, parkerized and Duracoated in flat black and sits in a Hogue overmolded stock.
NCsmitty