Lyman Case Head Space Gauge .338 Lapua Magnum

The Lyman Case Head Space Gauge in .338 Lapua Magnum is a precision one-piece, non-adjustable cylinder-type gauge purpose-built for reloaders who need to verify resized brass. Each gauge is machined to check the headspace (base-to-datum line) of resized .338 Lapua Magnum cartridge cases, confirming that cases have been properly trimmed and resized to spec before being reloaded.

Constructed of hardened metal for long service life, this caliber-specific gauge provides reliable, repeatable checks for the .338 Lapua Magnum, a popular long-range and precision rifle bottleneck magnum cartridge. Simply insert a resized case into the gauge: if the case head sits flush with the gauge face, the case is within dimensional spec; if it protrudes, the case still requires additional sizing or trimming.

Lyman headspace gauges are sold per caliber, and the .338 Lapua Magnum version is an essential bench tool for any precision reloader prepping magnum-length bottleneck cases. It is an ideal companion to case trimmers, deburring tools, and case prep stations for verifying that every case meets proper dimensional specifications before loading.