[treg]

To address your other question: most JSPs and JHPs have a rounded frontal profile, which tends to "push" muscle and tissue out of the way (unless the bullet is expanding, for these purposes, let's say it isn't). This "pushing" effect is similar to the that of the old .38 Special LRN bullets. The bullets would actually create a smaller hole than their caliber, due to tissue stretching. This was the reason the LRN bullets were considered very poor performers for human and animal targets. The flat, wide meplat (nose) and sharp shoulders of the traditional Keith SWCs and LBT-type bullets instead cuts a hole clean through, the size of the bullet. Penetration with these rounds is excellent.

This has been my experience as well. HP's also tend to make a small entry wound and if that's that's the only drain hole you have tracking can be difficult. Two full caliber holes allow a lot of blood to leak out for much easier tracking.