Winchester Copper Impact 7mm Remington Magnum Ammo 150 Grain Copper Extreme Point Polymer Tip Lead Free Box of 20

Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.

Winchester Copper Impact 7mm Remington Magnum ammunition pairs a 150-grain solid copper Extreme Point polymer tip projectile with brass cases and boxer primers for hunters working lead-restricted jurisdictions or seeking monolithic bullet performance on medium to large game. The 7mm Remington Magnum cartridge is a belted magnum centerfire rifle round delivering flat trajectory and high retained energy at extended ranges, making it a standard choice for elk, mule deer, and pronghorn across open western terrain. This load uses a solid copper bullet that expands immediately on contact while retaining nearly 100% of its original mass, eliminating the fragmentation common to jacketed lead-core designs. The polymer tip initiates expansion upon impact, creating a large wound channel without shedding weight during penetration.

Built for the Box

The Extreme Point projectile features an extended ogive and boattail base that increases the ballistic coefficient, flattening trajectory and reducing wind drift compared to flat-base hunting bullets. Solid copper construction means no lead core to separate from the jacket, ensuring consistent penetration depth even when bone is encountered. The polymer tip protects the hollow point cavity during feeding and flight, then drives rearward into the cavity on impact to initiate rapid expansion from the nose backward. Winchester loads this projectile into nickel-plated brass cases with non-corrosive boxer primers, allowing for reliable ignition in temperature extremes and straightforward reloading after firing. Each case is reloadable, and the nickel plating reduces friction during chambering and extraction.

The Numbers

This load sits in the middle of the 7mm Remington Magnum weight spectrum — lighter than 160-175 grain bullets used for deep penetration on elk at close range, but heavier than 140 grain bullets intended for fast-moving pronghorn and whitetail. The 150 grain weight offers a balance between velocity retention and wind resistance, typically generating 2,900-3,000 fps from a 24-inch barrel depending on chamber dimensions and environmental conditions. For more 7mm rem mag ammo options including traditional jacketed and bonded-core hunting loads, see our full inventory sorted by bullet weight and construction.

Who It’s For

Copper Impact loads suit hunters working California, Oregon, or other states with lead ammunition restrictions on public land, as well as shooters who prefer monolithic bullet performance regardless of regulation. The solid copper construction appeals to those prioritizing weight retention and consistent expansion across a range of impact velocities — this projectile will perform predictably whether you connect at 50 yards or 400 yards, because there is no lead core to fragment or separate. The 150 grain bullet weight works well for mule deer, whitetail, pronghorn, and black bear at typical hunting distances, and remains effective on elk when shot placement targets vitals rather than heavy shoulder bone. If you hunt mixed terrain where shots range from timber to open prairie, this load provides the accuracy and terminal performance needed to connect on game at varying distances without swapping ammunition.