Hornady Lock-N-Load Modified Case Features The Hornady Lock-N-Load Modified Case in the A Series is machined from brass and threaded specifically to mate with the Lock-N-Load Overall Length Gauge allowing the case to screw on securely and remain perfectly square during measurement. That squareness is critical since any misalignment between the case and the gauge translates directly into an inaccurate overall length reading at the chamber. The neck of the case has been opened slightly and made perfectly round which lets a standard diameter bullet slide in effortlessly while still staying concentric with the case body. This combination of features gives handloaders a dependable way to find the exact seating depth where their bullet contacts the rifling lands. Built specifically in .338 ARC this modified case pairs with the Lock-N-Load gauge system which is sold separately along with the dial caliper needed to take final measurements. Hornady has produced reloading tools and components for over sixty years and this modified case reflects that long-standing commitment to measurement accuracy at the bench. Precision seating depth is one of the most important variables in tuning a load for accuracy and this tool removes the guesswork from that process. Reloaders working up .338 ARC loads will find this modified case an essential addition to their precision reloading kit. Hornady Lock-N-Load Modified Case Specifications Manufacturer: Hornady Model: Lock-N-Load Modified Case Caliber: .338 ARC Material: Brass Type: A Series Quantity: 1 Available At: GrabAGun