The Importance of Consistent Ammunition

The importance of consistent ammunition for Long Range shooting cannot be over-emphasized.

Take for example a rifle that is zeroed at 50 yards, with the only parameter that is varied being the muzzle velocity.

With a muzzle velocity difference of 50fps at 100 yards, the vertical spread is only 0.05 inches. This would make a single ragged hole, thus leading the ladder tester/shooter to believe they have found a great load for their rifle, right?

Compare this with what that 50fps muzzle variance results in at 1,000 yards: a vertical spread of 1.37 MOA, or 14.3 inches! A good chronograph is an essential part of your toolkit when testing loads, and a good load for your rifle not only has to yield a tight group at 100 yards but needs a standard deviation (SD) / extreme spread (ES) as low as you can possibly get in order to enable good long range performance.

Note: this is a simple result of a theoretical calculation. The fact is, with an extreme spread (ES) of 50fps, the theoretical 0.05” at 100 yards may be fictional, because of the rifle system’s harmonics; this may not be observable in nature.

Image credit: Tony Darst

* * *


Low standard deviation (SD) / extreme spread (ES) becomes much more critical for precision impacts at distance than at closer ranges.


Subscribe to our email newsletter...

Get News, Deals, and Updates

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.


No items found.

Get great reloading equipment and services from the best suppliers

Sign-up NOW to our FREE LONG RANGE giveaways

Long Range Giveaways worth $10,000s