Ballistic App and Suppressed Rifles Changing Bullet Velocity

Ballistic App and Suppressed Rifles
Ballistic App and Suppressed Rifles

U.S.A.-(AmmoLand.com)- Suppressors are great tools for serious shooters, especially long-distance competitors and hunters. Quality suppressors reduce muzzle blasts to safe hearing levels without hearing protection, making communication between shooters more efficient. In most cases, a suppressor will even lessen the felt recoil of a rifle. However, shooters need to make specific allowances for suppressed firearms.

“A suppressor can change your rifle’s point of impact,” said Curt Vaughn, veteran long-distance shooting competitor and Head of Product for Ballistic. “If you shoot with your suppressor on all the time, you should be fine. However, if you have it on and off, you will, in most cases, see a shift in impact from zero when going from an unsuppressed to a suppressed rifle.”

When possible, Vaughn advised, always keep the suppressor attached to your rifle. However, if you do have to remove it for certain shots, make sure you know the point of impact shift which will result, and holdover and/or to the side accordingly.

One question that frequently comes up: how might a suppressor affect your bullet’s velocity?

Interestingly, a recent study looked at this question and found that a suppressor can alter your load’s feet per second (fps) velocity. And here, Ballistic can aid the long-distance shooter.

The study, “Effects of Sound Suppressors on Muzzle Velocity, Bullet Yaw, and Drag,” was written by four researchers based on tests they conducted at the Fusilier Complex, a private shooting range in Lafayette, Louisiana. Using rifles chambered in .300 Win Mag, the researchers shot four different factory ammunition loads; three of the loads were fired through rifles equipped with different models of suppressors, while the fourth load was shot unsuppressed.

Among other variables, muzzle velocities were recorded for each load. Compared to the rifles and loads with no suppression, many suppressed loads showed a slight decrease in fps, from 10- to 30-fps slower. However, depending on the ammunition used, some of the suppressed loads produced muzzle velocities 10- to 20-fps above non-suppressed loads. Will plus or minus 10- to 30-fps affect your accuracy? Not if you are shooting at steel or a big bull elk a couple of hundred yards away.

But once you go long, like 1,000 yards or more, a difference of 30-fps can and will change important variables including bullet drop and the point at which the bullet goes from super- to sub-sonic, Vaughn noted.

The only way to know the effect of your suppressor on your bullet’s velocity is to chronograph your loads with your rifle’s suppressor attached and with it off. If the velocities are the same? Your current Ballistic profile for that round is good to go. But if there’s a variation, you will want to develop a new Ballistic profile and have both profiles ready in your iPhone, iPad or laptop. Name one, “6.5 CM-UNSUPP,” for example, the other “6.5CM-Suppressed.”

This way, you will be ready for that precision shot with or without your suppressor attached.


About Ballistic

Ballistic is the definitive ballistics trajectory calculator, intended for long-range and precision shooters who want a serious–and a seriously accurate–application. Ballistic will calculate your bullet’s trajectory, windage, velocity, energy, lead, and flight time for any valid range. The app can also compensate for atmospheric conditions such as temperature, barometric pressure, humidity, and altitude–it can even accept density of air or density altitude inputs! The world-renowned JBM Ballistics engine powers all Ballistic computations. Ballistic is used by competition shooters, long-range hunters, and the military to deliver the most precise calculations possible.

With Ballistic, you’ll be able to make the most accurate calculations for every shot, everywhere, even in areas with no cellular coverage.

For more information, please visit WWW.BALLISTICAPP.COM

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Ryben Flynn
Ryben Flynn
9 days ago

The only POI change I noticed was going from a flash hider, to the suppressor. Negligible shift from no muzzle device to a suppressor. Directing the escaping gases upwards with a flash hider like the A2 birdcage to minimize muzzle rise also tends to allow the bullet to rise slightly as it leaves the flash hider.