Last reviewed: 2026-04-19 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
When your hunt demands precision at extended range, 270 Winchester ammo loaded with Sierra GameKing bullets gives you the ballistic edge. The Sig Sauer Marksman Hunter line is engineered for the hunter who measures shot placement in inches, not feet — precision-loaded ammunition that delivers competition-level accuracy in the field. The 140-grain jacketed hollow point combines Sierra’s proven GameKing profile with a boat tail base that reduces drag, flattens trajectory, and cuts wind drift when that whitetail or mule deer steps out at 300 yards.
Performance at a Glance
Each 270 Winchester round in this 20-round box delivers 2950 feet per second at the muzzle and 2705 foot-pounds of energy — velocity that keeps the bullet supersonic well past typical hunting distances. The Sierra GameKing bullet features a thick jacket for reliable weight retention on medium game and a skived nose that initiates expansion on impact. With a G1 ballistic coefficient of 0.337, this boat tail design maintains velocity downrange better than flat-base bullets of the same weight. Sig Sauer loads these rounds in new-production brass with non-corrosive boxer primers — cases you can reload when the season ends.
Specs at a Glance
| Spec | Value |
|---|---|
| Caliber | 270 Winchester |
| Bullet weight | 140 grains |
| Bullet type | Jacketed Hollow Point (Sierra GameKing) |
| Muzzle velocity | 2950 feet per second |
| Muzzle energy | 2705 foot-pounds |
| G1 ballistic coefficient | 0.337 |
| Rounds/box | 20 |
| Case | Brass, reloadable |
| Primer | Boxer |
| Corrosive | No |
| Intended use | Hunting (medium game) |
| Manufacturer | Sig Sauer (USA) |
The boat tail design and thick jacket construction make this load a strong choice for deer-sized game where shot distances stretch beyond 200 yards. Browse our full 270 ammo inventory for additional hunting and target loads.
Safe Handling & Compliance
Federal law requires purchasers to be at least 18 years old for rifle and shotgun ammunition, and at least 21 for handgun ammunition. Ammunition cannot be shipped to certain states, counties, and cities — review our ammunition shipping restrictions before ordering. Store ammunition in a cool, dry location away from heat sources and out of reach of unauthorized users.
- Follow the four universal rules of firearms safety at all times — treat every firearm as if loaded, never point at anything you are not willing to destroy, keep your finger off the trigger until ready to fire, and be certain of your target and what lies beyond it.
- Verify current state and local ammunition purchase laws before ordering — some jurisdictions require permits, background checks, or impose magazine capacity restrictions that may affect your purchase.
- This ammunition contains lead components. Wash hands thoroughly after handling, and follow Proposition 65 guidance if you reside in California.
Reviews
There are no reviews yet.