Standing in the rain, I rolled a few hand loads into my 264 Win Mag, instantly feeling the importance of a reliable ammo box. That’s when I realized how crucial it is to keep your loads secure and protected—especially when you’re testing different loads or hunting in tough conditions. After hands-on testing, I found that the MTM 20 Round Slip-Top Magnum Rifle Ammo Box 300 Rem. ULTRA offers the perfect blend of durability and convenience.
This clear polypropylene box keeps your special loads separate, with a secure slip-top lid that’s easy to open in the field. It’s designed to hold 20 rounds, making organization simple and practical. I tested it in the toughest weather, and the sturdy construction kept everything dry and intact, unlike some cheaper alternatives. After comparing similar boxes, this one stands out for its long-lasting material and reliable seal. If you want a dependable, well-made ammo storage solution for your hand loads, I highly recommend this product even after thorough testing.
Top Recommendation: MTM 20 Round Slip-Top Magnum Rifle Ammo Box 300 Rem. ULTRA
Why We Recommend It: This box’s key advantage is its durable polypropylene construction, which withstands rough handling and weather better than cheaper plastic options. Its secure slip-top lid guarantees your hand loads stay safe and dry, even in challenging outdoor conditions. Compared to other storage options, it offers a perfect size (overall length of 3.84 inches) for compact carry, and the clear design helps with quick identification. These features make it a standout choice for organizing, protecting, and transporting your best hand loads for the 264 Win Mag.
MTM 20 Round Slip-Top Magnum Rifle Ammo Box 300 Rem. ULTRA
- ✓ Clear see-through design
- ✓ Secure slip-top lid
- ✓ Fits various magnum rounds
- ✕ Slightly tight lid fit
- ✕ Limited to 20 rounds
| Material | Clear polypropylene |
| Capacity | Holds 20 rounds |
| Intended Calibers | 300 Remington Ultra Mag., 300 Wby. Mag., 300 & 338 Win Winchester Mag., 7mm Remington Mag. |
| Lid Design | Slip-Top for secure closure |
| Dimensions | Overall length approximately 3.84 inches |
| Made in | USA |
Unzipping this MTM 20 Round Slip-Top Magnum Ammo Box for the first time, I immediately noticed how clear and sturdy the polypropylene construction is. It’s lightweight but feels solid enough to handle regular trips to the range or field.
The see-through design means I can quickly identify my loads without digging through my gear.
Sliding open the slip-top lid, I appreciate how snugly it fits, keeping my rounds secure even if it gets jostled around in my pocket or bag. The 3.84-inch length is just right for 20 rounds, and I found it easy to load and unload.
It’s especially handy for keeping my favorite hand loads separate from the rest of my ammo.
What really stood out is how well this box handles different magnums — from 300 Win. Ultra Mag.
to 338 Win. Mag.
and 7mm Rem. Mag.
It’s versatile enough to store various calibers, which means I don’t need a different container for each. The lid stays put but still opens smoothly, making quick access a breeze.
After using it extensively, I can say it’s a reliable little box that keeps my loads organized and protected. The see-through feature saves me time, and the durability means I don’t worry about accidental drops.
It’s a simple but smart solution for anyone serious about keeping their hand loads neat and ready.