Will these .3105 inch diameter bullets work accurately in an older Lee-Enfield with a worn barrel?

These bullets are optimised for barrels slugging at .310 to .311 inches. However, in older or worn Lee-Enfield surplus barrels where groove measurements exceed .312 to .314 inches, you may experience accuracy degradation due to poor gas sealing and rifling engagement.

Are these Hornady 174 grain FMJ-BT bullets suitable for hunting deer and medium game in Australia?

No, this product features a non-expanding Full Metal Jacket (FMJ) design, making it strictly intended for paper, steel, or military service rifle competitions. Most Australian state game regulations prohibit solid FMJ projectiles for hunting deer, requiring expanding soft-point or polymer-tipped alternatives instead.

What rifle twist rate is required to properly stabilise the Hornady 174 Grain FMJ-BT projectiles?

While Hornady does not publish a proprietary minimum twist rate for this bullet, it is specifically engineered to stabilise perfectly within the classic 1-in-10 inch twist standard found on historic Lee-Enfield No. 1 Mk III and No. 4 Mk I service rifles.

Do I need to present a firearms licence to purchase these reloading bullets in Australia?

Yes, while inert projectiles are not classified as explosive propellants or primers, their retail sale and postal transit within Australia are regulated by state and territory firearms laws. In several jurisdictions, purchasers must present a valid Firearms Licence matching the relevant category, such as Category B, to complete the purchase.

.303 Bullets - Hornady 3131B

The Hornady .303 Calibre .3105" 174 Grain FMJ-BT (Full Metal Jacket Boat Tail) bullet in an 1,800-count bulk pack (MPN: 3131B) is engineered for high-volume handloaders replicating traditional British service rifle ammunition. Designed specifically for .303 British rifles and barrels slugging between .310" and .311", this component projectile mirrors the external ballistics of classic military Mk VII and Mk VIIIz service rounds. Featuring Hornady's Advanced Manufacturing Process (AMP) jacket, the projectile eliminates wall-thickness variations to ensure concentricity and stable flight characteristics during target shooting.

Key Features

AMP Copper Alloy Jacket: Provides consistent concentricity with virtually zero wall-thickness variation, preventing jacket-core separation and deformation upon firing.
Aerodynamic Boat-Tail Profile: Features a secant ogive geometry and a boat tail base with a cannelure, delivering a G1 ballistic coefficient of 0.470 for reduced drag and stable transonic transitions.
High-Volume OEM Bulk Packaging: Supplied in an 1,800-count loose bulk package weighing approximately 20.3 kg, designed for workshop reloading benches.
Service Cartridge Replication: Matches the historic 174-grain projectile weight, making it suitable for service rifle matches using standard 1-in-10" twist barrels.

Product Specifications

Manufacturer Part Number (MPN): 3131B
Calibre: .303 British
Bullet Diameter: 0.3105 in (7.886 mm)
Bullet Weight: 174 grains (11.27 g)
Bullet Profile: Full Metal Jacket Boat Tail (FMJ-BT) with cannelure
Overall Bullet Length (OAL): 1.263 in (32.08 mm)
Ballistic Coefficient (G1): 0.470
Sectional Density: 0.255
Package Quantity: 1,800 projectiles
Calibre Compatibility: Nominal .310–.311 bore platforms, including .303 British, 7.62×39mm, 7.62×54R, 7.65×53mm Argentine, and 7.7×58mm Japanese (subject to bore dimensions).

Who is the Hornady .3105 303 Cal 174 Grain FMJ-BT Bullet 1800 Pack for?

Competitive historic military service rifle shooters — demands the historic 174-grain military specification and an aerodynamic 0.470 G1 ballistic coefficient to replicate standard British service ballistics in vintage bolt-action platforms.
High-volume handloaders of .303 British — requires the 1,800-count bulk packaging to sustain extended reloading runs for .303 British rifles with consistent component dimensions.
Target shooters practicing from 100 to 500 yards — utilizes the 0.3105-inch diameter projectile to maintain gas seal, rifling engagement, and stable transonic flight over 100 to 500 yards in barrels with .310" to .311" groove measurements.

Less suitable for: Barrels with standard .308" bores, worn Lee-Enfield barrels with groove measurements exceeding .312 to .314 inches where a true .312-diameter or oversized cast lead projectile provides proper bore obturation, or medium-to-large game hunting where a non-expanding FMJ bullet is prohibited and an expanding soft-point or polymer-tipped hunting bullet must be substituted.

SKU	HN43002LP
Model #	3131B
Brand	Hornady
Shipping Weight	1.0000kg

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Hornady 3131b Bullets 303 Caliber 174 Grain Fmj 1800 Pack

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