---
title: "Underwood Xtreme Defender 10mm Auto 155gr Solid copper Micro, 50 Rounds"
description: "$85.94 at Keystone Shooting Supply, 6% below usual."
type: "product"
category: "ammo"
brand: "Underwood"
landed_price: 85.94
currency: "USD"
price_per_round_cents: 171.9
best_store: "Keystone Shooting Supply"
deal_signal: "lower"
usual_price: 91.47
updated: "2026-10-19T13:05:00.000Z"
url: "https://trigger.deals/p/underwood-xtreme-defender-10mm-auto-155gr-solid-copper-micro-50-rounds-9g6"
site: "Trigger Deals"
data: "sample"
---

# Underwood Xtreme Defender 10mm Auto 155gr Solid copper Micro, 50 Rounds

> Lowest landed price: **$85.94** at Keystone Shooting Supply (★ 4.8, 24,471 reviews), **$1.72/rd**. 6% below usual (usual $91.47, the 90-day median). Only 4 left, verified 2026-10-19 13:05 UTC.

- Item price $75.99 + $9.95 shipping. Landed price excludes sales tax.
- 90-day range: $75.45 to $95.26
- 2-year low: $72.35 (Jan 27, 2025)
- Price unchanged for 1 day (since 2026-10-19 08:26 UTC)
- MSRP: $112.99 (24% off)
- Brand: Underwood. Category: ammo.
- [Buy at Keystone Shooting Supply](https://trigger.deals/go/underwood-xtreme-defender-10mm-auto-155gr-solid-copper-micro-50-rounds-9g6?store=keystone-shooting)

## Compare stores (4)

Ranked by landed price: the item plus shipping to you, before tax.

| Store | Rating | Landed price | Per round | Versus best | Item price | Shipping | Stock | Verified |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Keystone Shooting Supply (best) | ★ 4.8 | $85.94 | $1.72 | Best price | $75.99 | $9.95 | Only 4 left | 2026-10-19 13:05 UTC |
| Prairie Fire Supply | ★ 4.1 | $86.44 | $1.73 | +1.00¢/rd | $76.49 | $9.95 | Stock not reported | 2026-10-19 12:44 UTC |
| Red River Outdoors | ★ 4.4 | $91.98 | $1.84 | +12.1¢/rd | $76.99 | $14.99 | In stock | 2026-10-19 11:30 UTC |
| Gulf Coast Guns | ★ 4.6 | $92.94 | $1.86 | +14.0¢/rd | $76.99 | $15.95 | In stock | 2026-10-19 10:49 UTC |

## Price history

Lowest landed price across stores, weekly over the last 90 days (full daily history: [JSON API](https://trigger.deals/api/v1/products/underwood-xtreme-defender-10mm-auto-155gr-solid-copper-micro-50-rounds-9g6?days=730)).

| Date | Lowest landed price |
| --- | --- |
| Jul 27, 2026 | $89.34 |
| Aug 3, 2026 | $75.45 |
| Aug 10, 2026 | $76.43 |
| Aug 17, 2026 | $91.89 |
| Aug 24, 2026 | $91.47 |
| Aug 31, 2026 | $91.47 |
| Sep 7, 2026 | $91.50 |
| Sep 14, 2026 | $91.50 |
| Sep 21, 2026 | $91.00 |
| Sep 28, 2026 | $91.00 |
| Oct 5, 2026 | $92.58 |
| Oct 12, 2026 | $86.82 |
| Oct 19, 2026 | $85.94 |

## About this product

50 rounds of Underwood Xtreme Defender 10mm Auto 155gr Solid copper Micro: 10mm Auto with 155 grains Solid copper bullets and nickel-plated brass cases. Made for self-defense. Some states require an age check or ship ammo only to a dealer; the store confirms at checkout.

## Specs

| Spec | Value |
| --- | --- |
| Caliber | 10mm Auto |
| Bullet weight | 155 grains |
| Bullet type | Solid copper |
| Case | Nickel-plated brass |
| Rounds | 50 |
| Use | Self-defense |
| Variant | Micro |

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