Not sure what you're asking, but a B34 is a 25 yard reduction B27 that is 17.5" x 23". A B27 is 23" x 35". A B29(resisting comments about big and slow) is a 50 foot reduction of B-27 police silhouette that's 11.5" x 22".
Still an aimed centre of mass shot. Closer the target the more you have to aim vs point.
You can buy pink B-27S-PT targets and donate to the cure for breast cancer if you want.
http://www.letargets.com/prodcat/pap...-b27b29b34.asp
Practice with whatever ammo you're issued.