Winchester Ammo Lctss2037 Last Call 20Gauge 3" 1Oz Tungsten 7Shot 10 Per Box/10 Case

Winchester Last Call TSS ammunition brings tungsten shot technology to 20-gauge waterfowl hunting in a 3-inch, 1-ounce load with #7 shot. If you've been curious about tungsten for waterfowl but thought it was only available in 12-gauge, this load makes the switch accessible without stepping up in gun size. Tungsten delivers significantly more downrange energy and penetration than traditional steel shot in the same payload weight, which matters when you're threading shots through cover or at distance.

The real advantage here is pattern density. A 1-ounce tungsten load throws roughly 40% more pellets downrange than a comparable steel payload, concentrating your shot column in a tighter, deadlier pattern. That means a wider effective kill zone and fewer wounded birds lost to the marsh. The sealed wad and primer are engineered to handle wet conditions—rain, snow, and spray won't compromise reliability the way moisture can compromise conventional ammunition.

Winchester recommends pairing these loads with a light modified choke or less constriction to optimize patterns. The 18 G/CC density of the tungsten shot gives you the ballistic benefits without requiring you to completely re-tune your gun setup.

Key Features

• Tungsten shot (18 G/CC density) delivers over 50% more payload energy and 1.8x greater penetration versus equivalent steel loads
• 40% more pellets per shot than comparable steel ammunition for denser, more reliable patterns
• Sealed wad and primer designed for water resistance and reliable performance in harsh weather
• 3-inch magnum case and 1-ounce load optimized for 20-gauge waterfowl hunting
• #7 shot size for waterfowl applications

Specifications

Frequently Asked Questions

What choke should I use with Winchester Last Call TSS 20-gauge ammunition?

Winchester recommends using a light modified choke or less constriction to achieve optimal patterns with these loads. The density of tungsten shot patterns differently than steel, so tighter constrictions than you'd normally use for steel may over-tighten your pattern.

How does tungsten shot compare to steel for waterfowl hunting?

Tungsten delivers over 50% more payload energy and 1.8 times greater penetration than an equivalent weight of #2 steel at typical waterfowl ranges (30-inch circle at 40 yards). The 1-ounce tungsten load also throws approximately 40% more pellets than a comparable steel load, creating a denser pattern and wider kill zone.

Are these loads sealed against water and moisture?

Yes. The sealed wad and primer are specifically designed to resist water penetration and provide reliable performance in wet conditions, including rain, snow, and spray typical of duck and goose hunting.

What's included in the case packaging?

Each case contains 10 boxes of Winchester Last Call TSS ammunition, with 10 rounds per box, for a total of 100 rounds.