Hi mate my best load for the 222rem mag is
Case REM
Primer fed
Powder AR 2206
Weight 27.7gr
Bullet nosler 50gr bt spitzer
Col 2.460"
That's my old bench rest load and shoots very well in my rifle

Hi mate went over my notes for my martini 22k hornet with ADI powder and I have used 35gr and 40gr vmax bullets
With the 35gr vmax I worked up to 13.5gr of 2205 but was hot for a martini extraction system it was my first wild cat chamber and I backed that load down to 13gr but had trouble getting those bullets for a few years and moved on to the 40gr vmax
In my rifle I don't think you can get to much ar2207 behind the 40gr bullet (not compressed) to cause to much pressure I used 12.5gr and it shot very tight groups but I don't think it well give the fastest FPS
All my loads wear worked up befor I had a chronograph !
The load I use ATM is 40gr vmax and 11.5 gr of 2205 which is not hot in my rifle and wen I get time I well work up a bit higher and see how farst I can get that bullet to go
Hope this helps
Start a bit lower and see how you go