Hi,
I use RE15 powder, Lapua brass CCI BR2 primers and 55gr Sierra Game King. The base holds together well for penetration while the tip tends to expand well too. A good all-rounder projectile. For my part, if I were hunting something around a wold size, I'd use a 6mm or better. I'd be more humane.
I note that the Speer 70 gr has this as spec data
.22 Caliber, .224" Diameter, 70 Grain Semi-Spitzer Soft Point, Speer Varmint Hunting Rifle Bullets, 100 Bullets per Box
For 1-10" twist or faster
0.214 bullet coefficient
0.199 sectional density