HORNADY B300P 300 PRC LOCK-N-LOAD MODIFIED CASE

The Hornady Lock-N-Load Modified Case 300 PRC (B300P) is a brass tool case for reloaders who use Hornady Lock-N-Load O.A.L. and Precision Gauges to set exact bullet seating depth in 300 PRC rifles. This B300P modified case for 300 Precision Rifle Cartridge works with those gauges so you can match cartridge overall length to your rifle’s chamber instead of relying only on manual data.

Key Features

• Manufacturer part number: B300P
• Cartridge: 300 PRC
• Case family: Hornady Lock-N-Load Modified Case B Series
• Intended use: for use with Hornady Lock-N-Load Precision and O.A.L. Gauges
• Material: brass modified case
• Case body: manufactured to SAAMI 300 PRC chamber dimensions
• Neck: approximately 0.002 inch oversize to accept the same bullets you intend to load
• Case head: special fine thread at the head to attach directly to Lock-N-Load gauges and keep the case square in the chamber
• Quantity: one modified case per package

Special Features

• The B300P modified case uses a fine threaded case head so it screws securely into Hornady Precision and O.A.L. Gauges and stays aligned while you move the bullet up to the lands.
• The slightly oversize neck lets a 30-caliber bullet slip into the case mouth easily while maintaining light grip for smooth, repeatable movement during length checks.
• Hornady builds the B300P to chamber-realistic dimensions for 300 PRC, giving you a more accurate seating depth reference than simulated test bodies.
• Interchangeable B Series modified cases like the B300P let you run one Hornady gauge body across multiple modern magnum calibers by swapping cases.

Practical Benefits

• The Hornady Lock-N-Load Modified Case 300 PRC (B300P) gives you a repeatable way to find the cartridge length that fits your rifle’s freebore so you tune seating depth for accuracy rather than guessing from book lengths.
• Because the B300P case works with compatible straight and curved Hornady gauges, it fits many 300 PRC long-range and hunting rifles that accept the tool and lets you standardize your seating depth process across more than one gun.
• The brass construction and oversize neck let you test with the same bullets you plan to load, so the distance to the lands you measure transfers cleanly to your seating die setup.
• If you load 300 PRC for long-range, hunting, or match rifles, the Hornady Lock-N-Load Modified Case 300 PRC (B300P) is a practical choice that helps your handloads match your chamber and perform the way you built them.