.357 Magnum Ammo Prices & Cost Per Round
1,383 listings tracked · 1,052 in stock, across 15 retailers. Retailer feeds are checked every 15 minutes.
.357 Magnum by Use Case
.357 Magnum Cost Per Round History
.357 Magnum Price by Month
| Month | Median cost per round | Lowest cost per round | Change |
|---|---|---|---|
| November 2026 | $1.21/rd | 8.6¢/rd | -0.4% |
| October 2026 | $1.21/rd | 8.6¢/rd | -2.4% |
| September 2026 | $1.24/rd | 54¢/rd | — |
| August 2026 | $1.24/rd | 54¢/rd | -0.9% |
| July 2026 | $1.26/rd | 54¢/rd | +0.6% |
| June 2026 | $1.25/rd | 57¢/rd | — |
| May 2026 | $1.25/rd | 52¢/rd | -4.0% |
| April 2026 | $1.30/rd | 52¢/rd | — |
Median and lowest observed cost per round per calendar month, from in-stock listings tracked across supported retailers.
Want the whole market instead of one caliber? The Ammo Price Index chains these monthly medians across a fixed 12-caliber basket into a single month-over-month benchmark.
Frequently Asked Questions
What is a good cost per round for .357 Magnum?
The best cost per round we're currently tracking for .357 Magnum is $0.48/round. A typical CPR across 718 tracked offers is $1.21/round. Prices vary by brand, grain weight, and retailer.
Is .357 Magnum ammo cheap right now?
The typical cost per round for .357 Magnum is $1.21. Check our CPR trend chart above to see if current prices are above or below the 30-day average. Set a price alert to get notified when prices drop.
How do .357 Magnum prices vary by use case?
.357 Magnum ammo falls into different price tiers depending on intended use. Range / FMJ has a median of 66¢/rd (best deal 52¢/rd across 15 products). Self-Defense has a median of 64¢/rd (best deal 60¢/rd across 8 products).
Where can I find the cheapest .357 Magnum ammo?
Based on our tracking across 15 retailers, the cheapest .357 Magnum ammo starting at $23.99/box. We compare prices from BattleHawk Armory, Brownells, E-Commerce Arms, Good 4 Guns and more.
What should I compare when shopping for .357 Magnum ammo?
Compare .357 Magnum ammo by cost per round, bullet type, intended use, and stock status. Magnum defensive or hunting loads often price higher than basic range ammunition.
Other Calibers
Compare .357 Magnum ammo by cost per round. Open any product to see its full price history or set a price alert.
.357 Magnum Ammo Buying Context
.357 Magnum ammo searches usually compare magnum revolver loads, defensive ammunition, and range-friendly options. This tracker keeps live .357 Magnum prices, cost per round, and in-stock status together so shoppers can judge value without mixing it up with .38 Special.
Use this page to compare .357 Magnum ammunition across retailers, then follow related handgun and revolver hubs when benchmarking magnum ammo against .38 Special, 10mm, or .44 Magnum.