im looking to get a new scope for field target and think I've decided on a 12x42 SWFA scope. My question is what are the drawbacks to saving $100 and getting the rear focus model? The specs seem the same except one is side focus for $399 and the other rear focus for $299. Is this even a good mid range scope for hunter field target? Might even get a lower powered model for my hunting rifle if they are as good as everyone says. Rear focus could help me conceal movement while focusing the objective. Any input is appreciated.