Ballistics (Typical Factory Load)

1,650

Muzzle Velocity

fps

1,540

Muzzle Energy

ft-lbs

260

Typical Bullet

grains

11.43

Bullet Diameter

mm

0.180

Ballistic Coeff.

G1 BC

60,000

Max Pressure

PSI

36.5

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
240 gr (15.6 g) JSP	Hodgdon H110	27.5 gr 1.78 g	30.5 gr 1.98 g	1,650 fps	1.765	Hodgdon
240 gr (15.6 g) JSP	Alliant 2400	25.0 gr 1.62 g	28.0 gr 1.81 g	1,550 fps	1.765	Alliant
250 gr (16.2 g) JHP	Hodgdon Lil'Gun	26.0 gr 1.68 g	29.0 gr 1.88 g	1,600 fps	1.765	Hodgdon
260 gr (16.9 g) HP	Hodgdon H110	26.5 gr 1.72 g	29.5 gr 1.91 g	1,550 fps	1.765	Hodgdon
300 gr (19.4 g) JSP	Hodgdon H110	24.5 gr 1.59 g	27.0 gr 1.75 g	1,400 fps	1.765	Hodgdon
300 gr (19.4 g) JSP	Alliant 2400	22.5 gr 1.46 g	25.0 gr 1.62 g	1,350 fps	1.765	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.