You can shoot elephants behind the forelegs with an AK47 (7,65x39), also the .303 is used by poachers. But that is not ethical hunting. You can shoot like Bell with the 7x57, 173 gr at 2350 f/s if you are experienced like Bell to find the right spot for a side brain shot just in front of the earhole.
Green has been proven to be pleasing to human senses being associated with calmness, wealth, generosity, good luck and fertility. It is also the colour of peace. It is worth noting that the colour yellow biologically makes people feel more optimistic and energetic as it stimulates the release of the feel-good chemical seratonin.
A new study reconciles a debate that has long raged among marketers and psychologists: What color most improves brain performance and receptivity to advertising, red or blue? It turns out they both can, it just depends on the nature of the task or message. The study, which could have major implications for advertising and interior design, finds that red is the most effective at enhancing our attention to detail, while blue is best at boosting our ability to think creatively.