Tight, Consistent Patterns, Less Shot Deformation
Longer parallel section than Carlson's conventional tubes gives consistent shot patterns. Extra smooth interior surface minimizes shot deformation. Laser marked constriction provides fast identification. External knurled ring extends approximately 3/4" from end of barrel for fast changes between stations. Can be used with steel shot.
Big Book Catalog, Issue:71, Page:199
SPECS: 1704 stainless steel. Constriction (SIZE). Threads are as follows - Browning Invector-Plus - 12 ga., .820"-32.
Competition Grade Tubes, Extra High Polish Interior Improves Pattern & Accuracy
Nine choke constrictions let you precisely match load and shooting conditions. Minimum gap geometry and high resolution “RMS” interior finish gives less pellet deformation; consistently tighter patterns. Choke constriction is laser marked on color coded band, no need to remove tube to verify size. Long tube with hidden wrench slots extends beyond the length of the muzzle. Knurled grasping band speeds installation and removal. Helical rifled Diffusion spreader tubes provide a pattern that’s more open than cylinder.
Big Book Catalog, Issue:71, Page:198
SPECS: 17-4 stainless steel. Polished bright finish. Extends beyond muzzle approximately .812" (20.6mm). Use with lead and bismuth shot. Steel shot can be used with constrictions of Modified and larger. Diff indicates Diffusion Tube.