The reason we wear caps on the range is to keep brass from hitting our faces. Especially to avoid having brass get behind your glasses and burn your face. I forgot to wear my cap two days ago and a piece of .22 brass got behind my glasses.
As you might imagine, it was painful. Fortunately, I maintained my composure and didn’t muzzle my friend who was with me. Wear your safety equipment, including a cap. Nonetheless, be mentally prepared to get burned by brass, maintain your composure and your muzzle discipline.