Ballistics (Typical Factory Load)

3,800

Muzzle Velocity

fps

1,650

Muzzle Energy

ft-lbs

55

Typical Bullet

grains

5.7

Bullet Diameter

mm

0.255

Ballistic Coeff.

G1 BC

65,000

Max Pressure

PSI

48.5

Case Length

mm

🔧 Handloading Data

Reference load data for experienced reloaders. Always start at the start charge and work up. Consult official manuals before loading.

Bullet	Powder	Start	Max	Velocity	COAL	Source
40 gr (2.6 g) V-Max	Hodgdon H380	36.0 gr 2.33 g	40.0 gr 2.59 g	4,000 fps	2.350	Hodgdon
50 gr (3.2 g) SP	Hodgdon Varget	34.0 gr 2.2 g	37.5 gr 2.43 g	3,650 fps	2.350	Hodgdon
50 gr (3.2 g) SP	IMR 4064	33.0 gr 2.14 g	36.5 gr 2.37 g	3,600 fps	2.350	IMR
50 gr (3.2 g) SP	Alliant Reloder 15	34.5 gr 2.24 g	38.0 gr 2.46 g	3,700 fps	2.350	Alliant
55 gr (3.6 g) SPBT	Hodgdon H4895	32.0 gr 2.07 g	35.5 gr 2.3 g	3,550 fps	2.350	Hodgdon
55 gr (3.6 g) SPBT	Alliant Reloder 15	33.0 gr 2.14 g	36.5 gr 2.37 g	3,580 fps	2.350	Alliant

📐 Measurement Guide for Reloaders

Powder Charge

Measured in grains (1 grain ≈ 0.065 grams) using precision digital or mechanical scales. Maintaining strict powder weight is crucial for safety and velocity consistency.

Cartridge Overall Length (COAL)

Total length from case base to bullet tip. Checked with digital calipers. Must be within manufacturer's specified range to fit and feed from your firearm's magazine.

Cartridge Base to Ogive (CBTO)

Precision shooters measure to the ogive — the curved part of the bullet that first contacts the rifling — for more accurate bullet seating depth and consistency.

Case Length & Headspace

Brass stretches with firing. Measure case length to know when to trim. Use headspace comparators to check shoulder bump-back during sizing.

Neck Tension

The grip the brass has on the bullet. Measured with ball micrometers by comparing neck wall thickness before and after bullet seating.

Pressure Signs

Inspect fired brass for over-pressure: flattened primers, ejector marks, case head expansion. If unsure, reduce charge and consult your load manual.

⚠️ Always consult established reloading manuals (Hodgdon, Hornady, Lyman) for your specific bullet and powder combinations. For experienced reloaders only.