Ballistics (Typical Factory Load)

2,770

Muzzle Velocity

fps

2,554

Muzzle Energy

ft-lbs

150

Typical Bullet

grains

7.92

Bullet Diameter

mm

49,000

Max Pressure

PSI

56.44

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
150 gr (9.7 g) SPBT	Hodgdon H4895	35.0 gr 2.27 g	39.0 gr 2.53 g	2,650 fps	3.075	Hodgdon
150 gr (9.7 g) SPBT	IMR 4064	36.0 gr 2.33 g	40.0 gr 2.59 g	2,680 fps	3.075	IMR
174 gr (11.3 g) HPBT	Hodgdon Varget	36.0 gr 2.33 g	40.0 gr 2.59 g	2,500 fps	3.075	Hodgdon
174 gr (11.3 g) HPBT	Alliant Reloder 15	36.0 gr 2.33 g	40.0 gr 2.59 g	2,520 fps	3.075	Alliant
180 gr (11.7 g) SPBT	Hodgdon H4350	40.0 gr 2.59 g	44.0 gr 2.85 g	2,450 fps	3.075	Hodgdon
180 gr (11.7 g) SPBT	IMR 4350	39.0 gr 2.53 g	43.0 gr 2.79 g	2,420 fps	3.075	IMR

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.