Basically, you're looking for the broadest range of any variable (powder charge, seating depth, etc.), which lands bullets in the same spot. This can be done with and without a chrono. I color coat bullets with Sharpies to help keep track of impacts on a single target. I use white blueprint paper for targets. The applied sharpie color is left on the paper when each bullet passes through.

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Originally Posted by 16penny
If you put Taco Bell sauce in your ramen noodles it tastes just like poverty