Buy .300 Whisper Ammo – .300 Whisper for Sale

Explore a huge selection of.300 Whisper cartridges to find the one you're looking for right here at, the world's largest online auction site dedicated to firearms, hunting, shooting and accessories. We aim to provide you with all the necessary information you need to make an informed .300 Whisper purchase. Explore the history, technical specifications, ballistics and background of .300 Whisper ammo, then browse the listings of our trusted sellers to make your purchase.

Don't stop there; we've got plenty more to offer. We're the Internet's largest auction retailer of guns for a reason, after all. Check out our registered sellers' huge inventory of products related to .300 Whisper, including rifles from Mossberg and Hi-Point.

The Lowdown on .300 Whisper Ammo

SSK Industries created .300 Whisper ammo in the early 1990s as a cartridge that could utilize supersonic and subsonic bullet velocities. According to SSK, a Whisper cartridge "must be capable of sub-sonic extreme accuracy with very heavy bullets for its caliber, i.e. 240 grains, as well as moderate to high velocity while maintaining excellent accuracy with light bullets for the caliber, i.e. 125 at 2300 FPS in 30." The cartridge is based on the .221 Remington Fireball and has a rimless, bottleneck design. The Cartridge was designed with AR-15 and M-16 families of rifles in mind.

Other manufacturers

Although SSK Industries owns the trademark to Whisper, a number of other ammunition manufacturers offer similar cartridges under such names as .300 Warrior Carbine and .300-221, each based on the .221 Remington, as well.

Learn more about .300 Whisper Ammo and

We hope you've found this information on .300 Whisper helpful and informative. Thanks for shopping for .300 Whisper ammo at, the world's largest online auction site dedicated to firearms, hunting, shooting and accessories. And remember, auctions are always being added and updated, so check back regularly.


Selected Filters

  • No Credit Card Fee
  • Accepts GunBroker Pay
  • Completed Items
  • Take a Shot
  • Sponsored On-site Listings
  • Showcase Listings
  • Charity Auctions
  • Has Pictures
  • No Reserve
  • Immediate Checkout
  • International Shipping
  • Factory New
  • New Old Stock
  • Used
  • Price Range:
  • Barrel Length:
  • Caliber:
  • Capacity:
  • Frame Finish:
  • Gauge:
  • Grips:
  • Manufacturer:
  • Model:
  • Number of Rounds:
  • Number of Rounds:
  • Slide Finish:
  • Exclude Words:
  • Country:
  • State:
  • UPC:
  • Keywords:
  • Min Starting Bid:
  • Max Starting Bid:


Buy Format
$ to $
Listing Details
Item Condition
Show Only
Results for


Results for


Results for

{{currentKeywords}} in {{currentCatName}}

No results found or search too broad

Results for

300 Whisper

371 Items Found