While the shooting - as any shooting - does take time and money, what's the point of having a chart, proven or calculated, unless you're going to shoot? Just wanna feel good about having a drop chart taped to your stock like a "sniper?" A guy doesn't have to shoot pound upon pound of powder to suss out their projected drop chart.

What I honestly think most folks do wrong is use a 100yrd zero. Unless you're hunting Nickels and quarters, OR never shooting beyond 100, a 100yrd zero makes little sense.

Second biggest mistake is assuming your POI doesn't drift throughout a year, or throughout the life of a rifle. Temp stable powder or not, your bullet won't fly the same at 500yrds on all conditions, so having a rudimentary chart from any ballistics calculator OR EVEN ONE PRODUCED BY A DAY AT THE RANGE doesn't mean schitt.