Sinclair Stainless Steel Pilot Stop 41 Calibre (.410" - .412")
Sinclair manufacture pilots for their flash hole tool and their Neck Thickness/Variance Gauge. Their pilots are precision machined from stainless steel on CNC turning centers to properly fit new, unfired case necks.
Available for rifle and pistol cartridges from 22 thru 45 calibre. Not for use on .50 BMG. The 50 BMG flash hole diameter is larger.