600 OVERKILL for Sale
Browse 600 overkill listings from verified sellers across the U.S. on GunsAmerica.
Quick Look
The .600 Overkill is a custom big-bore rifle cartridge developed by American gunsmith Robert Garnick. Designed for extreme dangerous-game hunting, it delivers massive energy for reliable deep penetration. Though niche, it remains sought-after among big-game hunters targeting Africa's most formidable species.
Why It's a Top Choice
- Engineered specifically for dangerous African game
- Delivers immense stopping power at close range
- Compatible with custom bolt-action platforms
- Built for ultimate reliability in extreme conditions
- Favored by seasoned safari professionals
Key Variants
600 Overkill CZ 550 Conversion
Popular custom build using the robust CZ 550 Magnum action for African safari reliability.
600 Overkill Granite Mountain Arms
Premium bolt-action build using GMA actions, tailored for bespoke dangerous-game rifles.
600 Overkill D'Arcy Echols Custom
High-end custom rifle from renowned builder, favored by elite professional hunters.
Competitor Comparison
| Feature | 600 Overkill | 577 Nitro Express | 700 Nitro Express |
|---|---|---|---|
| MSRP | $8,000+ (custom builds) | $10,000+ (double rifle) | $40,000+ (custom double) |
| Capacity/Size | 2+1 (bolt-action) | 2 (break-action) | 2 (break-action) |
| Weight | 10–13 lbs | 12–13 lbs | 17+ lbs |
| Optics-Ready | Yes (custom scoped) | Typically no | Typically no |
| Trigger Type | Custom single-stage | Double trigger | Double trigger |
| Notable Pro | Massive stopping power in bolt-action form | Classic safari heritage | Ultimate energy transfer |
| Notable Con | Extremely limited ammo availability | High cost and recoil | Unmatched recoil and cost |
Best Use Cases
- Dangerous-game hunting (elephant, Cape buffalo)
- Africa-specific safari applications
- Serious big-bore rifle collections
- Professional hunting guides with extensive experience
FAQs
What is the 600 Overkill cartridge designed for?
It's built for taking down the largest and most dangerous African game, including elephant and Cape buffalo.
Can I buy a factory-built 600 Overkill rifle?
No factory rifles exist; they are all custom builds on Magnum actions like CZ 550 or Granite Mountain Arms.
How does the recoil of the 600 Overkill compare?
Recoil is extremely heavy—comparable to or exceeding .577 NE—requiring practice and proper rifle fit.
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