Hunters GuideAmmunition prices · Rifle
.300 Winchester Magnum Ammo Prices in Canada
- $2.50 a roundS&B 300 Win Mag, 180 Gr SPCE, Box Of 20TheAmmoSource · $49.95 for 20
- $2.50 a roundNorma - 300 Win Mag - 180 Gr - Whitetail - Soft Point - 20ct - 20178012Prophet River · $49.99 for 20
- $2.55 a roundNorma - 300 Win Mag - 150 Gr - Whitetail - Jacketed Soft Point - 20ct - 20177412Prophet River · $50.99 for 20
The cheapest .300 Winchester Magnum ammunition in stock at the Canadian retailers we track is $2.50 a round, at TheAmmoSource, as of 2026-11-03. We track 98 .300 Winchester Magnum listings across 6 retailers and show the cheapest below, in stock first.
.300 Winchester Magnum prices by retailer, cheapest first
The table lists .300 Winchester Magnum listings from the retailers we read, in stock first, then by cents per round. Over the last 21 days, the cheapest in-stock .300 Winchester Magnum we recorded held at $2.24 a round.
| Listing | Retailer | Price | Per round | Stock |
|---|---|---|---|---|
| S&B 300 Win Mag, 180 Gr SPCE, Box Of 2020 rounds · 180 gr · checked | TheAmmoSource | $49.95 | $2.50 | In stock |
| Norma - 300 Win Mag - 180 Gr - Whitetail - Soft Point - 20ct - 2017801220 rounds · 180 gr · SP · checked | Prophet River | $49.99 | $2.50 | In stock |
| Norma - 300 Win Mag - 150 Gr - Whitetail - Jacketed Soft Point - 20ct - 2017741220 rounds · 150 gr · SP · checked | Prophet River | $50.99 | $2.55 | In stock |
| Norma Whitetail .300 Win Mag 150 Grain Soft Point Box/2020 rounds · 150 gr · SP · checked | Wolverine Supplies | $52.95 | $2.65 | In stock |
| Federal - 300 Win Mag - 165 Gr - EuroCopper - 20ct - P300WCXI20 rounds · 165 gr · Monolithic/Lead-free · checked | Prophet River | $54.99 | $2.75 | In stock |
| Federal - 300 Win Mag - 150 Gr - Power-Shok - Jacketed Soft Point - 20ct - 300WGS20 rounds · 150 gr · SP · checked | Prophet River | $56.99 | $2.85 | In stock |
| Winchester - 300 Win Mag - 150 Gr - Super-X - Power Point - 20ct - X30WM120 rounds · 150 gr · checked | Prophet River | $56.99 | $2.85 | In stock |
| Hornady - 300 Win Mag - 165 Gr - American Whitetail TIPPED - SST - 20ct - 8202420 rounds · 165 gr · Polymer tip · checked | Prophet River | $58.99 | $2.95 | In stock |
| Hornady - 300 Win Mag - 150 Gr - American Whitetail - Interlock Soft Point - 20ct - 820420 rounds · 150 gr · SP · checked | Prophet River | $59.99 | $3.00 | In stock |
| NORMA 300 Win Mag 180gr Whitetail SP 20ct20 rounds · 180 gr · SP · checked | Bartons Big Country | $60.00 | $3.00 | In stock |
| Hornady 300 Win Mag SP Custom International Case (200 Rounds)200 rounds · SP · checked | CRAFM | $364.88 | $1.82 | Out of stock |
| Remington Core-Lokt 300 Win Mag Rifle Ammo, 150gr PSP – 20Rds20 rounds · 150 gr · PSP · checked | Rangeview Sports | $51.99 | $2.60 | Out of stock |
| Federal Power-Shok 300 Win Mag Rifle Ammo, 180gr JSP – 20Rds20 rounds · 180 gr · checked | Rangeview Sports | $51.99 | $2.60 | Out of stock |
| Hornady 300 Win Mag SP Custom International Box (20 Rounds)20 rounds · SP · checked | CRAFM | $53.99 | $2.70 | Out of stock |
Shipping notes for these retailers
- Rangeview Sports publishes free shipping over $350.00, but not on ammunition.
.300 Winchester Magnum loads and box sizes on offer
.300 Winchester Magnum is listed here in boxes of 20 to 200 rounds. Bullet weights run from 150 to 180 grains. Projectile types listed: SP, Monolithic/Lead-free, Polymer tip, PSP.
The prices above leave out shipping and any dangerous-goods fee. To see what a .300 Winchester Magnum order really costs per round once those are added, try the ammo cost calculator.
What the .300 Winchester Magnum is
The .300 Winchester Magnum is a centrefire rifle cartridge with a 0.308-inch bullet and a 67 mm case. The full chamber and cartridge drawings are published by SAAMI and C.I.P.
To see how Hornady's 180 gr American Whitetail InterLock SP load drops and drifts out to 500 yards, open it in the ballistics calculator.
Not interchangeable with .300 WSM, .300 AAC Blackout or .300 PRC, even though they share a bore size. We keep them as separate listings so a price is never matched to the wrong chamber.
Questions about .300 Winchester Magnum ammo prices
What is the cheapest .300 Winchester Magnum ammo in Canada right now?
On 2026-11-03, the lowest in-stock price we read was $2.50 a round: S&B 300 Win Mag, 180 Gr SPCE, Box Of 20, at TheAmmoSource, $49.95 for 20 rounds. Prices change without notice, so the retailer's page is the final word.
How many Canadian retailers sell .300 Winchester Magnum?
6 of the 14 retailers we read on 2026-11-03 listed .300 Winchester Magnum, and 4 had it in stock. We track 98 .300 Winchester Magnum listings in total and show the cheapest of them here.
Compare other cartridges: .17 HMR, .22 Long Rifle, .223 Remington, .243 Winchester, .270 Winchester, .30-06 Springfield, .300 AAC Blackout, .300 WSM, .303 British, .308 Winchester, .338 Lapua Magnum, .410 bore, .45 ACP, 12 gauge, 20 gauge, 6.5 Creedmoor, 7.62×39mm, 7mm Remington Magnum, 7mm-08 Remington, 9mm Luger. Or see every cartridge on one page, with filters.
Prices are what each retailer published when we read the page, and retailers change them without notice. This page compares prices only. What is lawful to hunt with, and where, is set by each province and territory; read the regulations for the place you hunt.