Caffeine affects me much more with powder burners or at a shared range where loud noise is happening. I have sensory integration issues related to hearing. Loud noises just seem to startle me. Caffeine makes it worse. Playing in the backyard I find it much easier to settle the crosshairs with similar levels of caffeine. I’m a 2-4 morning cups guy and find it hard to pass up. I travel with a French press and my own blend.
When I was in college, I shot on the 3 position small bore team. Every time we shot against the Coast Guard Academy, they always had a pile of donuts and coffee when we arrived. Of course, when waiting to shoot, what do you do? Stuff down the donuts and drink coffee. I always shot poorly until I figured out their method of madness.