Turbo6046:
I stand corrected and I am GLAD: good to see you have some manuals. If Hunter is not listed in the on-line Ramshot manual for the 22/250, I suggest you contact Ramshot to see if they can provide a starting load.
[The now-superseded Ramshot version 4.3 manual has a starting load of 39.4 gr. Hunter for the 220 Swift with the 50 gr. Nosler B-Tip bullet and for the 50 grain Hornady V-Max it lists 37 gr. of of Big Game; so that may give some comparison, albeit with different bullets of the same weight, and in a different caliber than the 22/250].
If you choose to not call Ramshot, of course, it is your choice on where to start, or not.
I prefer the powder company's lab experience over real world experience when choosing a starting load.....
Good Luck.