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Winchester Big Bore stands out as a no-compromise choice for hunters and those who value proven performance when it matters. The 158 grain semi-jacketed hollow point design does something most hollow points don't do well: it delays expansion until the bullet has already penetrated deeply into its target. This means better energy transfer and more consistent performance across different shooting distances and conditions.
The semi-jacketed hollow point is the key here. Your standard hollow point expands fast, which is great for some scenarios but can lead to rapid energy loss before reaching vital areas. Winchester took a different approach with this round. The copper jacket is tougher, the cavity is shaped to postpone that expansion slightly, and the result is a bullet that goes deeper while still delivering controlled expansion. You get roughly 500 foot-pounds of energy remaining at 100 yards, which is absolutely sufficient for deer-sized game with proper shot placement.
This load pushes that 158 grain projectile to 1460 feet per second, which is legitimately powerful for a handgun round. The brass casing is boxer-primed and fully reloadable, so if you shoot regularly, you've got a reason to save your empties. Whether you're running this through a 4-inch revolver, a snub nose, or feeding it through a lever-action carbine, Winchester Big Bore delivers consistency. The low-fouling propellant and quality primers mean fewer maintenance headaches at the range or in the field.
Manufactured in Illinois with components built to function reliably in everything from aging revolvers to modern semi-autos with magnum capability. The nose profile is safe for lever gun magazines if you're loading a carbine. Twenty rounds per box means you get what you paid for without waste, and the reloadable brass extends the value of every shot.
The SJHP design delays expansion until the bullet has penetrated deeper into the target, which means better energy transfer and more consistent performance at different ranges. The tougher jacket also minimizes fragmentation, helping the round maintain weight and penetration depth while still expanding for stopping power.
Yes, these come with reloadable boxer-primed brass casings. The cases are durable enough for multiple reloading cycles, which makes them economical for frequent shooters who handload. Just make sure to inspect each case before reloading as you would with any used brass.
Absolutely. The semi-jacketed hollow point nose profile is designed to be safe for lever gun magazines, and the round performs very well from rifle barrels. You'll actually get better velocity and flatter trajectory from a rifle, making it an excellent choice for hunting with a lever-action carbine.
The 158 grain Big Bore is heavier and hits harder than Winchester's lighter offerings like the 125 grain loads. It carries more energy downrange and provides better penetration on larger game. The trade-off is slightly more recoil, but the added stopping power makes it worth considering for hunting or serious defensive use.
| Caliber/Gauge | .357 Magnum |
|---|---|
| Case Material | Brass |
| Cost per Round | 1.55 |
| Grains | 158Gr |
| Length | 3.2500 |
| Manufacturer | |
| Manufacturer Part Number | X357MBB |
| Model | |
| Product Type | Jacketed Soft Point |
| Shipping Weight | 0.775 |
| Units per Box | 20 |
| UPC | 020892233010 |
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