Hornady B300 Lock-N-Load 300 REM Ultra Mag Modified Case

Hornady B300 Lock-N-Load 300 REM Ultra Mag Modified Case

• Made in the USA
• Threaded at the case head
• .002" Oversized case mouth to accept the projectile you will be using
• Manufactured to SAAMI Spec
• Necessary for use with the Hornady LNL OAL Gauge

Hornady specially prepares these cases by threading the case head and over sizing the neck to accept the same bullet you intend to load. This is critical, as the Lock N Load gauge dimensions obtained will be accurate to .001" Results such as this cannot be attained with competitive products, which use a simulated bullet with an arbitrary shape