With a lack of info these are some examples: A new bean field rifle such as a 26" 6.5 PRC could carry a 3-10x40mm or 4-14x44mm scope, a new field toting rifle would be 20" or 22" barreled 6.5 Creedmoor, 7mm-08 Rem or 308 Win with a fixed 4x32mm or 6x36mm or a 2-8x36mm variable or a 3-9x40mm variable, a bear buster in heavy timber would be a 22" 35 Whelen or 9.3x62 Mauser with a fixed 2.5x20mm, or 3x 28mm or a 4x32mm.