Sorry, but I've only used the 9mm hollow base Berry's. I do like those. The concept seems to be based on
1. more forward mass for the bullet
2. longer profile giving longer contact area in the barrel
3. perhaps bottom skirt expansion, yielding better bore obduration (seal) preventing gas escape past the bullet
A lack of planning on your part does not necessarily constitute an emergency on my part.
Last edited by serf 'rett; November 30, 2012 at 04:53 PM.