Rifle · Obsolete

.35 Newton

35 Newton

The .35 Newton was one of a family of high-velocity cartridges designed by Charles Newton in the 1910s, predating modern magnum rifles by decades.

Caliber
0.358″ · 9.093 mm
Introduced
1915
Case
Rimless
Primary use
hunting_large_game, hunting_dangerous_game
Status
Discontinued
Velocity2,660–2,800 fps
Energy3,927–4,874 ft·lb
Typical grains225 · 250 gr
Identity
Introduced
1915
Type
Rifle
Origin
United States
Inventor
Charles Newton
Manufacturer
Charles Newton Rifle Corporation
Standard
Obsolete
Status
Discontinued
Availability
Collector Only
Build
Case capacity
82 gr H₂O
Twist (typical)
1:12
Primer
Large Rifle Magnum
Case type
Rimless
Pressure & range
Max pressure
56,000 psi
Eff. range
300 yd
Recoil
15–22 ft·lb

Ballistics

Representative trajectory · 100 yd zero0–800 yd
100 yd · zero0″−124″124″ drop @ 800 yd0400800Open in Ballistic Compare ↗
Parent case

Representative trajectory — modeled from a single velocity input (no published BC for this cartridge yet).

Performance

Best for HuntingHSM Sierra GameKing BTSP225 gr · GameKing BTSP · 2,860 fpsBuy now →

Buy links open .35 Newton ammunition at Rivertown Munitions.

Dimensionscase measurements · scale drawing · size vs familiar rounds

Case dimensions — the scale drawing at the top of the page is built from these.

mixed/other · approximate
Measuremmin
Bullet ⌀9.090.358·
Neck ⌀9.760.384~
Shoulder ⌀12.670.499·
Shoulder angle21°~
Base ⌀13.330.525·
Rim ⌀13.330.525~
Belt ⌀n/a
Rim thickness1.170.046~
Neck length8.800.346
Case length63.902.516·
Overall length84.333.320~

Size vs familiar rounds

Drawn at true 1:1 — every case is accurate relative to the others. Absolute size depends on your screen's pixel density, so measuring one against a real ruler may be off. .35 Newton is highlighted below.

Factory loads

In production — 5 active loads across 5 brands. Top 15 shown · see all 19 →.

BrandLoadGrainBulletFPSft·lbBC
HSMSierra GameKing BTSP225GameKing BTSP2,8604,086
NoslerTrophy Grade AccuBond225AccuBond2,8604,086
Graf & SonsGraf Heritage250SP2,6603,927
DoubleTapDT Hunter225Bonded SP2,6603,534
Buffalo ArmsBuffalo Classic250SP2,6603,927
NormaNorma Standard250SP2,9004,668
PPUPPU Standard250SP2,9004,668
Sellier & BellotS&B Standard250SP2,9004,668
GrafGraf Standard250SP2,9004,668
Black HillsBlack Hills Standard250SP2,9004,668
WolfWolf Standard250SP2,9004,668
KynochKynoch Standard250SP2,9004,668
Western Cartridge Co.Super-X SP250SP2,8604,540
Newton ArmsSP Original250SP2,8604,540
PetersSP250SP2,8604,540

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

Suitable powders

1 reloading powder listed for .35 Newton, fastest to slowest. Cross-reference in the finder →

Reloading costestimate cost per round vs factory

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

Charles Newton was a visionary cartridge designer who understood the relationship between case capacity, pressure, and velocity decades before it became mainstream. His Newton rifle company produced several calibers — .22, .256, .30, .35 — all with unusually high velocity for the era. World War I disrupted his business, and repeated corporate failures left Newton in financial ruin. The cartridges died with his companies, though they are admired by ballisticians as historically significant designs.

FAQs

What twist rate does .35 Newton use?
.35 Newton typically uses a 1:12 twist rate.
What bullet diameter is .35 Newton?
.35 Newton uses a 0.358″ (9.093 mm) diameter bullet.
Is .35 Newton still in production?
.35 Newton is discontinued; typical availability is collector only.
What is .35 Newton used for?
.35 Newton is primarily used for hunting_large_game, hunting_dangerous_game.
What are the best powders for .35 Newton?
Reloading powders commonly listed for .35 Newton include N170.

Sources & provenance

Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 5 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →