Cartridge

8x64mm S

Caliber
0.323″ · 8.2 mm
Introduced
1912
Case
Rimless
Status
Obsolete
Velocity2,600–2,780 fps
Energy2,972–3,397 ft·lb · est.
Identity
Introduced
1912
Status
Obsolete
Build
Case capacity
69.5 gr H₂O
Case type
Rimless
Pressure & range
Max pressure
58,740 psi
Eff. range
350 yd

Ballistics

Representative trajectory · 100 yd zero0–800 yd
100 yd · zero0″−126″126″ drop @ 800 yd0400800Open in Ballistic Compare ↗
Parent case

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

Dimensionscase measurements · scale drawing · size vs familiar rounds

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

CIP TDCC · verified
Measuremmin
Bullet ⌀8.200.323
Neck ⌀8.960.353
Shoulder ⌀10.850.427
Shoulder angle14°
Base ⌀11.950.470
Rim ⌀12.000.472
Belt ⌀n/a
Rim thickness1.300.051
Neck length
Case length64.002.520
Overall length87.503.445

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. 8x64mm S is highlighted below.

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.

Lineage

Immediate parent
Root — no documented parent
Direct descendants (0)
Family TreeOpen 8x64mm S in the interactive cartridge family tree

Connected reference

FAQs

What bullet diameter is 8x64mm S?
8x64mm S uses a 0.323″ (8.2 mm) diameter bullet.
Is 8x64mm S still in production?
8x64mm S is obsolete.

Sources & provenance

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