The question of how rifle suppressors influence muzzle velocity (MV) has long been a subject of debate within the precision rifle community. Some competitors contend that a suppressor effectively lengthens the barrel, leading to an increase in MV, while others maintain that its effect is minimal or inconsistent.
To address this, an ongoing data gathering process has sought to clarify this by systematically comparing the same loads in identical rifles, both with and without suppressors. The aim is to determine if any meaningful conclusions can be drawn from the observed variations in MV.
Initial findings include observations from a Ruger Precision Rifle chambered in 6.5 Creedmoor. This particular test focused on five distinct 142 gr SMK loads, all fired through the same rifle. For comparison, each load was tested both unsuppressed and with a Q LLC suppressor. The data from this specific setup revealed a nuanced picture: three of the five loads registered higher muzzle velocities when fired unsuppressed, while the remaining two loads exhibited a higher velocity profile when paired with the Q LLC suppressor. These results suggest that any effect is not universally an increase, nor consistently a decrease, across different ammunition types.
Further observations from a Lithgow rifle, also paired with a Q can, supported a similar conclusion. With certain ammunition, a slight advantage in muzzle velocity was noted when the suppressor was attached. However, like the Ruger Precision Rifle data, these variations were not dramatic or consistently in one direction.
Based on the findings gathered to date from this ongoing study, the overarching conclusion indicates that suppressors exert a "negligible effect on muzzle velocity." This suggests that while minor fluctuations can occur, they are generally not significant enough to drastically alter ballistic trajectories or require major adjustments to established DOPE.
For PRS and NRL competitors, these preliminary findings carry important implications. While the reported differences in MV are subtle, even a negligible change can theoretically shift point of impact at extreme long range. However, the data suggests that these changes are likely within the margin of error for many competitive scenarios or easily accounted for through careful truing of ballistic data specific to a suppressed or unsuppressed setup. Shooters meticulously developing their loads and confirming their DOPE should consider testing both configurations if they intend to run suppressed in competition, though this initial data suggests the impact on MV may not be the primary driver for suppressor use.
