Tom
while I don't know how low of velocity will still open the partition, I would think that bullet on hogs would work very well...and would actually choose it over the Sierra, based on past experience..at least for hogs....

Hogs are a tough customer, shot a Warthog directly in the chest with a 400 gr A-Frame--bullet went into the chest and come to rest just below the tail on the other end..still ran about 50 yards before tipping over...

thx
Ripp