The .270 Winchester remains a popular choice for hunters and target shooters alike, prized for its accuracy and versatility. This guide provides comprehensive reloading data for the .270 Winchester, focusing on safety, accuracy, and achieving optimal performance. Always prioritize safety when reloading ammunition. This information is for educational purposes only; consult your reloading manual and always double-check your work before firing.
Understanding Reloading Basics Before You Start
Before diving into specific data, let's review fundamental reloading principles crucial for safe and successful reloading of the .270 Winchester:
1. Essential Equipment:
You'll need a reloading press (single-stage or progressive), dies (sizing, expanding, bullet seating), a powder measure, a scale (for precise powder charges), calipers, case trimmer, and appropriate safety gear (eye protection, hearing protection).
2. Case Preparation:
Thoroughly clean and inspect each case for any damage. Resize cases to the proper dimensions using your sizing die. Trim cases to a uniform length, ensuring consistent performance and preventing issues with bullet seating. Deburr and chamfer case mouths for smooth feeding and to prevent damage to your bullets.
3. Powder Measurement:
Accurate powder charges are paramount. Use a powder measure and always double-check your powder charge using a scale. Consistent powder charges are critical for consistent ballistics. Never estimate powder charges.
4. Bullet Seating:
Seat bullets to the desired depth, ensuring consistent overall cartridge length (OAL). Consult your chosen reloading manual for recommended OAL. Improper bullet seating can lead to dangerous pressure increases.
Reloading Data for the .270 Winchester:
The following data is for informational purposes only. Always refer to your reloading manual for specific data based on your chosen components (bullets, primers, powders). This data represents a range and should be treated as a starting point, not a definitive prescription. Always work up your loads slowly and carefully, starting with the minimum charge listed and gradually increasing.
Note: This data is presented as an example and should not be used as a definitive guide. Always consult a reliable reloading manual for specific data corresponding to your chosen components.
| Bullet Weight (grains) | Powder (type) | Powder Charge (grains) | Primer | OAL (inches) | Notes |
|---|---|---|---|---|---|
| 130 | IMR 4350 | 50.0 - 53.0 | Federal 210M | 2.800 - 2.850 | Start low, work up |
| 130 | RL-19 | 52.0 - 55.0 | Remington 9½ | 2.800 - 2.850 | Start low, work up |
| 140 | H4831SC | 54.0 - 57.0 | Winchester Large Rifle | 2.820 - 2.870 | Start low, work up |
| 150 | IMR 4350 | 52.0 - 55.0 | CCI 200 | 2.830 - 2.880 | Start low, work up |
Critical Considerations:
- Primer Type: Using the incorrect primer can be dangerous. Always use the primer type specified in your reloading manual.
- Powder Type: Different powders burn at different rates, affecting pressure and velocity. Using the wrong powder is extremely dangerous.
- Bullet Type: Bullet type (e.g., jacketed, soft point, boat-tail) influences ballistics.
- Case Condition: Use consistently prepared cases to maintain consistent performance.
- Chronograph: Use a chronograph to measure velocities and ensure that you're within safe pressure limits.
Safety First: Essential Reminders
- Always consult a current reloading manual from a reputable manufacturer before beginning. This information is for educational purposes only.
- Never mix different powder types.
- Always wear safety glasses and hearing protection.
- Work in a clean and well-ventilated area.
- Keep children and pets away from your reloading area.
- Inspect each cartridge carefully before loading it into your firearm.
This comprehensive guide provides a foundation for safe and effective reloading of the .270 Winchester. However, remember that reloading is a precise process requiring attention to detail and a commitment to safety. Always prioritize safety and consult your reloading manual frequently.
