What I figure for next season is to stay with my hard cast WLN and WFN boolits for the .44, .475 and .45 as they work to perfection. But the 45-70 will use a 50-50 WW and pure boolit with a hollow point, heat treated. I do not believe the meplat size itself will affect killing power as the boolit will upset. I just need to be careful that they do not expand too much or come apart.
The boolit picture Crass posted looks about perfect.
I want to slow the boolit in the deer, reduce the frontal pressure wave so lung tissue is closer to the boolit for a larger primary wound channel.
It is a funny thing to think about! Let us say you are shooting a very large animal with a very fast hardcast with a large meplat. Shoot it at a quartering to you angle and damage to lungs is poor and the slowing boolit does it's most damage in the guts.
Now shoot a quartering shot from the rear so the boolit slows before it hits the lungs and results will be much better because the lungs will subject to a more effective velocity.
Strange how us rednecks think!