@ 11:28 am (GMT)
Thomas KitchenHI James
Have a read of this thread it might help http://www.ballisticstudies.com/Resources/Discussion+Forums/x_forum/24/thread/14961.html
My take on things is if we look at the smaller say quarter bores and smaller we have to be weary of to much energy transfer and not enough penetration, that's why you have to be careful with matching projectiles to game weights.
Now when when we move towards the bigger bores 338,358 etc we have to be careful of to much penetration and not enough energy transfer.
Once again we have to match projectiles to game weight.
We can look at construction of a projectile to help but we can also drop the weight down to decrease S.D to help make sure more energy is transfered to the animal.