H380 was the old standard for 55gr. in the .22-250. That was Bruce's load - 38.0gr.
spome of the guys I knew back in the 70's used the 70gr. Speer for Vanvouver Island deer in their .222 3-position Match rifles.
Others just used 50gr Speer spitzers. Pretty much didn't matter with side head shots, but the 70's were good for lung shots - according to those old WW11 pilots. I miss those guys.