Brass cases Peterson .243 Winchester SRP

Peterson .243 Winchester SRP brass is a premium component for handloaders who require excellent dimensional consistency, uniform internal capacity and repeatable neck tension. The Small Rifle Primer configuration makes it especially attractive for precision, competition and long-range ammunition.

Peterson manufactures its cases in the USA from C260 cartridge brass. The production process includes multiple drawing operations, forming the case head and primer pocket, precision trimming, punching the flash hole and final induction annealing of the neck and shoulder. Induction annealing allows the temperature applied to each case to be precisely controlled, helping to achieve consistent material properties throughout the batch.

The SRP version features a 0.060" (approximately 1.52 mm) flash hole, which is smaller than the 0.080" flash hole used in Peterson LRP cases. The smaller primer pocket leaves more material around the case head. Shooters who choose Peterson SRP brass frequently mention durable, tight primer pockets, long case life and consistent velocity results among its main advantages.

Peterson brass is often compared favourably with Lapua brass in user reviews. The most commonly reported advantages include low case weight variation, uniform neck-wall thickness, minimal runout, consistent case length and a strong construction suitable for repeated reloading. Users of Peterson brass in various calibres also report that the primer pockets remain tight after multiple firing cycles.

KEY ADVANTAGES

• Small Rifle Primer pocket,
• small and uniform 0.060" (1.52 mm) flash hole,
• manufactured from C260 cartridge brass,
• tight and precisely formed primer pockets,
• uniform case and neck-wall thickness,
• consistent internal case capacity,
• induction-annealed neck and shoulder,
• precisely trimmed case mouth,
• designed for multiple reloading cycles,
• every case inspected during production,
• manufactured in the USA,
• supplied in a protective plastic box containing 50 cases.

TECHNICAL SPECIFICATIONS

Manufacturer: Peterson Cartridge
Calibre: .243 Winchester / .243 Win
Alternative calibre designation: 6.17 × 51 mm
Product type: new rifle brass cases
Condition: new and unfired
Material: C260 cartridge brass
Case type: rimless, bottleneck
Primer pocket: Small Rifle Primer – SRP
Flash-hole diameter: 0.060" / approximately 1.52 mm
Primers included: no
Neck and shoulder treatment: induction annealed
Finish: cleaned brass
Quantity: 50 cases
Packaging: durable plastic ammunition box
Country of manufacture: USA
Manufacturer number: PCC243SRP50 / 40006R
UPC: 859449006681

.243 WINCHESTER STANDARD DIMENSIONS

Maximum case length: 51.94 mm / 2.045"
Maximum case body diameter near the head: 11.96 mm / 0.471"
Maximum case-head diameter: 12.01 mm / 0.473"
Maximum shoulder diameter: 11.53 mm / 0.454"
Maximum outside neck diameter: 7.01 mm / 0.276"
Bullet diameter: 6.17 mm / .243"

PETERSON REFERENCE DATA – LOT N136

Average empty case weight: 168.4 gr / approximately 10.91 g
Average internal capacity: 53.5 gr H₂O / approximately 3.47 cm³
Shoulder diameter: 0.452" / 11.48 mm
Base diameter: 0.468" / 11.89 mm
Neck-wall thickness: 0.0155" / approximately 0.394 mm
Loaded neck diameter: 0.272" / approximately 6.91 mm
AMP Aztec code for lot N136: 0152
AMP pilot: #11

The weight, internal capacity and dimensional values above are reference measurements published for a specific production lot. Measurements may vary slightly between production batches.

IMPORTANT INFORMATION

Peterson SRP brass features a flash hole measuring approximately 1.52 mm. Check the diameter of your decapping pin before removing spent primers. A standard oversized decapping pin may damage the flash hole, the case or the decapping tool.

The internal capacity of Peterson brass may differ from cases produced by other manufacturers. Whenever changing case brands or switching from LRP to SRP brass, the load should be developed again, beginning with safe starting data from a current and reputable reloading manual. Never exceed the maximum pressures specified by C.I.P. or SAAMI.

FAQ

Do these cases include primers?

No. These are new, unprimed and unloaded brass cases.

What is the difference between SRP and LRP brass?

The SRP version uses a Small Rifle Primer pocket and a 0.060" flash hole. The LRP version uses a Large Rifle Primer pocket and a larger flash hole.

Are the cases ready for handloading?

The cases are factory annealed and cleaned. Nevertheless, every case should be inspected, measured and prepared according to your normal case-preparation procedure and the instructions provided by the manufacturers of the components being used.

Does SRP brass provide better accuracy than LRP brass?

Small Rifle Primers are often preferred by competition shooters because of their potential for consistent ignition and extended primer-pocket life. However, SRP brass does not automatically guarantee improved accuracy. The final result depends on the complete load, rifle, primer, propellant and load-development process.

Is SRP brass suitable for cold-weather use?

Ignition performance depends on the primer, propellant, load and temperature. For applications where the most dependable ignition in very low temperatures is essential, Peterson also offers an LRP version.