Hi. I'm new around here and am looking to build my first wild cat cartridge rifle. I ordered a Savage Model 12 LPV in .223 and am thinking of changing it to 20 VarTarg and putting a Gaillard barrel on it. I'm considering ordering a 20 inch,or possibly 22 inch barrel) and was wondering what the thought were on these different lengths? I'll be using to punch paper and gophers to 300 yards or so, and might use it for the occasional coyote at no more than 200-300 yards. If I'm looking for flying gopher/body parts should I concentrate my reloading on the 32 or 40 GR Vmax bullets? Thanks in advance.