Peterson 40071-P 7Mm Rem Mag Long 250

Peterson Cartridge brass represents a reliable foundation for handloading 7mm Remington Magnum ammunition. The Peterson 40071-P 7mm Rem Mag Long offers 250 pieces of unprimed rifle brass—the core component you need to build consistent, match-grade rounds for long-range hunting or precision rifle competition. Whether you're developing loads for a new rifle or maintaining a proven recipe, quality brass that chambers cleanly and maintains dimensional consistency shot after shot makes the difference between acceptable and exceptional handloads.

Reloaders who work with the 7mm Rem Mag know that brass quality directly affects velocity spreads, accuracy, and case longevity. Peterson Cartridge has earned respect among serious handloaders for attention to detail in primer pocket dimensions, case wall thickness, and overall build quality. A 250-piece bulk box gives you enough material for a solid day at the range or to build a complete load development sequence without running short mid-project.

This is unprimed brass—you'll need a reloading press, dies, primers, powder, and projectiles to complete your ammunition. If you're new to handloading, reference the NSSF or a trusted reloading manual for safe practices specific to magnum rifle cartridges. For experienced reloaders, Peterson brass integrates seamlessly into established workflows and delivers the consistency that precision shooting demands.

Key Features

• 250 pieces of unprimed Peterson Cartridge brass per box
• 7mm Remington Magnum specifications
• Suitable for handloading rifle ammunition for hunting or target applications
• Bulk quantity ideal for load development or maintaining reloading inventory

Specifications

Frequently Asked Questions

Can I use Peterson 7mm Rem Mag brass for both hunting and target shooting?

Yes. This brass is suitable for handloading ammunition for hunting, target practice, and competition applications. The cartridge itself is widely used across all three disciplines, and brass quality matters for all of them.

What do I need to reload 7mm Rem Mag ammunition?

In addition to this brass, you'll need a reloading press, 7mm Rem Mag reloading dies, primer pockets (small rifle magnum or large rifle magnum, depending on your brass), powder, projectiles (bullets), and a reliable reloading manual or load data source specific to the 7mm Remington Magnum. Always follow safe reloading practices.

Is this primed or unprimed brass?

This is unprimed brass. You will need to prime the cases during your reloading process.

How many boxes would I need for a full load development session?

One 250-piece box should provide ample material for a thorough load development sequence. Typical development work involves testing various powder charges and bullet weights in small batches. Actual quantity needed depends on how many variations you plan to test and how many rounds you fire per load.