Rifle · CIP standardized

.375 Flanged Magnum

Holland & Holland's rimmed version of the .375 H&H, designed for use in double rifles where rimmed cases feed more reliably.

Identity
Introduced
1912
Type
Rifle
Origin
United Kingdom
Inventor
Holland & Holland
Manufacturer
Holland & Holland
Standard
CIP standardized
Status
Limited
Availability
Limited
Dimensions
Bullet ⌀
0.375″
Case capacity
95 gr H₂O
Twist
1:12
Primer
Boxer Large Rifle
Case type
Belted
Performance
Max pressure
47,137 psi
Eff. range
400 yd
Recoil
25–35 ft·lb

Ballistics

Representative trajectory · 100 yd zero0–800 yd
100 yd · zero0″−139″139″ drop @ 800 yd0400800Open in Ballistic Compare ↗
Velocity
2,500–2,650 fps
Energy
3,747–4,202 ft·lb
By real loads
2,400–2,650 fps · 19 loads
Typical MSRP
$1.80/rd · price history →
Parent case

Representative trajectory — modeled from a single velocity input, not a measured load. Real published loads span the "by real loads" range above.

Factory loads

In production — 19 active loads across 9 brands. Top 15 shown · see all 19 →.

BrandLoadGrainBulletFPSft·lbBC$/rd
NormaBondstrike/Oryx270Bonded Soft Point2,6504,209$2.75
KynochBig Game / Nitro Express270Metal Covered Soft Nose2,6504,209$8.00
NoslerTrophy Grade260AccuBond2,6003,902$0.85
BarnesVOR-TX270TTSX BT2,5503,898$0.85
WoodleighWeldcore270Weldcore SP2,5503,898
RWSH-Mantel270H-Mantel2,5503,898$1.80
FederalPremium Cape-Shok Trophy Bonded300Trophy Bonded Bear Claw2,5304,263$0.85
NormaBondstrike/Oryx300Woodleigh Solid2,5004,163$2.75
FederalTrophy Bonded Bear Claw300Trophy Bonded Bear Claw2,5004,163$0.85
HornadyDGX Bonded SP300DGX Bonded SP2,5004,163$0.85
HornadyDGS FMJ Solid300FMJ Solid2,5004,163$0.85
A-SquareDead Tough SP300Dead Tough SP2,5004,163
KynochSP Soft Nose300Soft Nose2,5004,163$8.00
KynochFMJ Solid300FMJ Solid2,5004,163$8.00
KynochBig Game / Nitro Express300Metal Covered Solid2,5004,163$8.00

Velocities are manufacturer-stated (test-barrel). Discontinued loads dimmed.

Dimensions

.375 Flanged Magnum cartridge dimensions diagram

Reloading cost

Estimate your cost per round and how it compares to factory. Inputs are yours — nothing is stored.

Cost estimate only — not load data. Charge weight is your input; follow published manuals for safe charges.

Connected reference

History

Holland & Holland introduced the flanged (rimmed) version of their .375 Magnum in the early 1900s for use in double rifles, where rimmed cases improve reliable extraction. Offers ballistics similar to the rimless .375 H&H but intended for break-action and double-barrel rifles favored by dangerous game hunters.

FAQs

What twist rate does .375 Flanged Magnum use?
.375 Flanged Magnum typically uses a 1:12 twist rate.
What bullet diameter is .375 Flanged Magnum?
.375 Flanged Magnum uses a 0.375″ (9.53 mm) diameter bullet.
Is .375 Flanged Magnum still in production?
.375 Flanged Magnum is limited; typical availability is limited.
What is .375 Flanged Magnum used for?
.375 Flanged Magnum is primarily used for hunting.

Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 19 live factory loads; the trajectory is modeled (point-mass), not measured. Spotted an error? Report it →