I'm going on my first big game hunt on the 23rd, and I wanna get my rifle all set up. It's sighted in at 250 yards and I would like to use a ballistic calculator to get an estimate of how many clicks adjustment I need at various ranges. I'm runnin out of time! My buddy who is big into hunting recommended this site, www.biggameinfo.com and I also have a ballistic calculator on my iphone. But I honestly don't even know how to fill out the information. Here is the rundown on my rifle and the rounds I am gonna be shooting. .308 with 1:11 barrel twist. 22" barrel. gonna be shooting 168 gr HPBT Sierra Match King bullets. Scope is a Leupold Mk 4, 4.5-14x50. Mil-dot 1/4 MOA adjustment.