I believe Saskatchewan made it legal last year, and it's okay in Ontario, but what about the rest? I could check "the Google", but it is easier to ask here.
It's quite legal here.
I use a 1:9" faux TI in 22-250 with 52gr TSX. Have used 70gr Speers in the past in my old 1:14" A-Bolt 22-250.
