It wasn’t a Tikka, but when I was shooting an 8” twist 22-250, it’s favorite load by far, was R15 pushing the 75gr Amax to 3200. That load would should sub 3” 5 shot groups at 700 yards. It was amazing.

John

If my people, who are called by my name, will humble themselves and pray and seek my face and turn from their wicked ways, then I will hear from heaven, and I will forgive their sin and will heal their land. 2 Chronicles 7:14