One common misconception is that different bullets expand slower or faster. But considerable testing shows most start expanding when they hit skin, and normally expand completely by the time they penetrate their own length--and very few big game bullets are even two inches long. This is also why the area around the entrance hole usually has the most bloodshot and shredded meat.
The exception to this is some high-BC, hollow-point bullets where the hollow-point is actually closed, or nearly so. Instead of the hollow-point initiating expansion, as it does in hunting bullets with a larger opening, it collapses inward, so expansion's delayed somewhat. This is why Berger Hunting VLDs normally don't expand until penetrating 2-3 inches.
Great info, thanks.
