Redding 338 Caliber Stainless Pilot Stop for 3/16″ Mandrels 06133

Description

If you run a Redding Case Neck Gauge or Flash Hole Deburring Tool, the right caliber-specific pilot stop is what makes the whole setup work. This one is machined for .338 caliber brass and fits standard 3/16" mandrels, so it slides right onto your existing Redding tooling and plays nice with mandrels from other makers too.

The part itself is CNC-machined from stainless steel, which means it holds its dimensions trip after trip and won't rust on you in the reloading room. What sets these pilot stops apart is the subtly undercut shape. That little design detail keeps the stop from grabbing imperfections at the case mouth or the neck-to-shoulder junction, so your dial indicator gives you smooth, trustworthy numbers instead of readings that jump around.

Where the 338 Pilot Stop Earns Its Keep

For folks turning or gauging .338 necks, this piece handles the alignment and depth reference that keeps your prep consistent from case to case. Pair it with the Redding Case Neck Gauge and you get repeatable neck thickness measurements. Drop it on the universal flash hole deburring tool and it helps index the case while the built-in stop rides the inner web to control cutting depth.

Picking the Right Redding Pilot Stop

Redding offers these in two mandrel sizes. The small 9/64" versions exist for .17 and .20 caliber work and cases with tiny flash holes, while this .338 model uses the standard 3/16" mandrel like the rest of the common rifle calibers. If your tools take a 3/16" mandrel, this is the one you want for .338 brass. It's a small, inexpensive piece that quietly makes a real difference in how uniform your handloads come out, which is exactly why precision reloaders keep a full caliber set on the bench.