Do we need a scientist to teach people how to shoot or explain things? I doubt it. It'd just be nice if people just explained things how they know them rather than trying to trump it up and play the science card. Teaching, lube, gun parts...
"I grip really hard" is an acceptable thing to say, no need to talk about how since Pluto is no longer a planet combined with the price of tea in China multiplied by the angle of the dangle is how hard you should grip the gun.