New "Outside-In" Flash Hole Reamer for Large Flash Holes

For years, Sinclair Int’l has offered a reamer for small, BR-sized flash-holes, product #07-3000. This popular tool features an 0.0625″ cutting tip to uniform the .059″ flash-holes on Lapua 220 Russian, 6mmBR, 6.5 Grendel, and 6.5×47 brass. Sinclair’s tool works from the outside, indexing off the primer pocket. For those people who believe in the utility of reaming small flash-holes (an open question), the Sinclair “outside-in” design may be the best. But until now, there has been no equivalent “outside-in” reamer for cases with large flash-holes.

Sinclair recently introduced its NEW .081″ large flash-hole reamer, item #07-3081. This $37.50 tool is designed to ream standard flash holes (.080″) to exactly .081 inch, both for small primer pockets and large primer pockets. This tool will remove most burrs left in manufacturing and will uniform the flash-hole diameter of all your brass to ensure consistent ignition.

Double-Ended Design Works with Both Small and Large Primer Pockets
Sinclair’s all-stainless three-piece tool features a double-ended reamer guide for both large and small primer pockets, a knurled handle for easy turning and a straight fluted .081″ reamer. It is designed for all cartridges (with either small OR large primer pockets) with standard .080″ flash holes.

As one Sinclair customer noted: “This is a tool that has been needed for a long time.” As a result, the .081″ flash-hole reamers have been back-ordered through 12/1/2009. But if you order now you should have yours within 5-6 weeks.

IMPORTANT: We recommend, if you order this tool, that you mic the actual diameter of the cutter tip. We have found that some flash-hole reamers, of ALL brands, arrive with slightly oversized cutter tips. Indeed we’ve seen tip diameters of other brands (not Sinclair) vary by as much as .006″ (six-thousandths). You want to make sure you don’t have an oversize cutter before you ream hundreds of cases.