Description
.243 WSSM 100 Grain Nosler Partition- The .243 Winchester Super Short Mag (WSSM) is a high-velocity, flat-shooting centerfire cartridge from the WSSM family that delivers magnum performance in a short action. Developed in the early 2000s to maximize case efficiency and shorten action length, the .243 WSSM propels 80–105 grain bullets at impressive speeds, producing a flat trajectory and strong downrange energy.
Ideal for varmint work, pronghorn, and medium game like deer, the .243 WSSM shines where long-range precision and low wind drift matter. Hunters value its light recoil, quick follow-up shots, and effective terminal performance with suitable bullets — producing humane kills at extended ranges when shots are well-placed. Highlights include efficient case design, high retained velocity, and excellent ballistic coefficients in modern bullets, all in a compact, short-action package.
Why it remains a great hunting caliber: it balances accuracy, energy, and shootability. For those who want magnum-like trajectories in a compact rifle with manageable recoil, the .243 WSSM offers versatile performance for small to medium game while providing the long-range confidence many hunters seek. Though factory loads are less common than mainstream cartridges, handloaders appreciate the .243 WSSM for efficient powder use, easy tuning, and excellent barrel harmonics when matched to quality bullets today.
Choice Ammunition’s .243 WSSM loaded with the 100-gr Nosler Partition is the best choice for deer, antelope, and predators. The Partition’s dual-core design delivers controlled expansion and deep penetration, ensuring ethical, one-shot kills on medium game. Choice’s hand-loading process uses precise powder charges and quality brass to maximize velocity and consistency, producing exceptional accuracy and reliable terminal performance. Low recoil helps fast follow-ups, while high retained energy at range makes it ideal for open-country shots where long-range performance matters.
The Bullet:
The Nosler Partition bullet has earned it’s respect with the following characteristics
1 Nosler Engineering
Nosler’s special lead-alloy, dual-core provides superior mushrooming characteristics at virtually all impact velocities.
2 Fully Tapered Copper-Alloy Jacket
Ruptures instantly at the thin jacket mouth, yet the gradual thickening along the bullet’s axis controls expansion and curls the jacket uniformly outward at high and low velocities.
3 Nosler’s Integral Partition
Supports the expanded mushroom and retains the rear lead-alloy core. The enclosed rear core retains more than two-thirds of the original bullet weight for deep penetration.
4 Dual-Core Construction
Every Partition bullet in the Nosler line delivers optimum length, weight and ogive design for maximum in-flight and terminal performance.
- 100% Hand-Loaded
- Velocity: 3,0338
- G-1 BC 0.384
