In the US military and PRS competitions, serious shooters are now using .260, .243, 6mm, or 6.5 mm-based cartridges for long-range precision shooting. 6.5 Caliber suppressors are a very niche category. These cartridges push light bullets very fast and increase the effective range and accuracy. Having a 6.5mm bore for these rounds makes the suppressor efficient at mitigating blast and noise.