WARNING: Use of the Optima HP choke tube in an Optima firearm (without the HP designation) can cause severe damage to the choke tube and barrel when the shotgun is fired. Only use Optima HP choke tubes in these Optima HP shotguns: SV10 Perennia, SV10 Prevail, A400 Family of shotguns, 690, 692, 694, DT-11 and 1301 Comp Pro.
***Please note that the constriction cut off for factory made choke tubes with steel shot is a Modified constriction, factory made choke tubes with a constriction tighter than Modified such as Improved Modified and Full are not suitable for use with steel shot.
Additionally, rifled or sabot slugs should not be used in a factory made choke tube with a constriction tighter than Improved Cylinder.***
How Can I Identify My Choke Tubes?
Where can I find the constrictions or dimensions on my Beretta choke tubes?
