Bowhunting Blog Whammer Jammer Crossbow Ballista By Hunting NetworkJanuary 14, 2010 LAST UPDATED: May 8th, 2015 Makes any slug or roundball your ammo! No more bent, lost, expensive bolt shooting. Quiet, backyard target shooting – hard hitting, very accurate. Easy, simple, long parts life Adjustable from .32 – .44 cal. You may also like: Attract More Deer! Make Your Mark Podcast.05/17/2024May 17, 2024Moose Upper Deck System05/10/2024May 10, 2024Were the Turkey Hunting Changes in Tennessee Worth It?04/17/2024April 17, 2024Vortex Launches New Eyewear Line04/5/2024April 5, 2024