Using Bench-Rest Testing

An effective way to get the most out of your resources is to do bench-rest testing. As you test and understand how your firearm performs with different load combinations, your marksmanship will improve also.

To develop effective loads, always refer to the owner’s manual for your firearm. Know the manufacturer’s recommendations before you begin.

Your firearm usually will shoot more accurately with some loads than with others. Only testing determines the best load.

• Test the firearm and loads, not your marksmanship. Using the bench-rest position isolates firearm performance as well as load efficiency, while still improving your shooting skills. Your goal in bench testing is to make the shots as consistent as possible. The best loads deliver the smallest groupings on the target.
• Use the scientific method to perform the testing.
  • Use checklists to organize the elements you’re testing, the order of testing, and the steps involved so that nothing is forgotten.
  • Isolate and test one element at a time (projectile, powder, patching, and so on) while keeping other elements consistent. Record all of these scenarios in a notebook throughout the entire testing process. Include all specifics related to the firearm; the ammunition variables; information about the target, range, and procedure; and basics such as the date and location. Record velocity if you use a chronograph.
  • Eliminate all high-level variables which would compromise your results. For example, avoid testing in windy conditions.

Steps for Testing Firearm Performance

1. Load the rifle, and use a pencil or tape to mark the ramrod temporarily so that you can identify the position at which the loads are seated correctly.
2. Shoot a group of three shots with the initial load. Take steps to replicate hunting conditions with the firearm.
   • Allow the barrel to cool between shots.
   • To make better use of your time, use a wet cloth to speed the cooling.
   • Remove residue by wiping out the bore, cleaning the flash hole, and scraping the tip of the breech plug.
3. Shoot a reliable group with each load variety, and then review the results to confirm your preference.
   • The group should be unaffected by variables you note such as wind.
   • If you see abnormal deviations, test the round again to eliminate any variables that may have affected the shot.
4. Increase the charge by a volume equivalent to five grains and, without changing other elements of the load, fire another three-shot group.
5. When you identify your best hunting load, mark this on the ramrod with a permanent marker.