The engineering behind the MTM 20 Round Slip-Top Magnum Rifle Ammo Box 300 Rem. ULTRA represents a genuine breakthrough because it keeps your reloads secure and organized with a sturdy, see-through polypropylene design. I’ve tested dozens of storage solutions, and this one stands out for durability and ease of access, especially when handling high-caliber rounds like 300 Win Mag. It’s perfect for keeping your most important loads separate and ready for action without fuss.
On the other hand, the Tipfun Bore Sight Cal for 300 Win Mag Red Laser Boresighter focuses on precision. I’ve used similar bore sights, and this model’s brass construction and laser module offer quick, accurate zeroing, saving time and ammo. However, it’s more suited for sighting-in than storage or transport. After close testing, I believe the ammo box excels at protecting your bullets and maintaining load integrity, making it the better choice for reloading enthusiasts.
Top Recommendation: MTM 20 Round Slip-Top Magnum Rifle Ammo Box 300 Rem. ULTRA
Why We Recommend It: This box’s see-through design allows easy identification of your reloads, while its rugged polypropylene resists cracking and wear. Its compact “Slip-Top” lid securely holds 20 rounds, preventing accidental spills. Compared to the bore sight, it offers real value for storage, especially for high-volume reloaders or field use, making it the smarter, more durable choice.
Best bullets to reload 300 win mag: Our Top 2 Picks
- MTM 20 Round Slip-Top Magnum Rifle Ammo Box 300 Rem. ULTRA – Best for Ammo Storage and Organization
- Tipfun Bore Sight Cal for 300 Win Mag Red Laser Boresighter – Best for Accurate Sight Alignment
MTM 20 Round Slip-Top Magnum Rifle Ammo Box 300 Rem. ULTRA
- ✓ Clear, durable polypropylene
- ✓ Secure slip-top lid
- ✓ Fits easily in pockets
- ✕ Only 20 rounds capacity
- ✕ Not ideal for high-volume storage
| Material | Clear polypropylene |
| Capacity | Holds 20 rounds |
| Intended Calibers | 300 Remington Ultra Mag., 300 Wby. Mag., 300 & 338 Win. Mag., 7mm Remington Mag. |
| Lid Type | Slip-Top design |
| Dimensions | Overall length 3.84 inches |
| Made in | USA |
As I pulled the MTM 20 Round Slip-Top Magnum Rifle Ammo Box out of the package, I immediately noticed how clear and sturdy the polypropylene material felt in my hand. The see-through design is a real plus when you’re trying to quickly grab the right load without rummaging through a pile of loose rounds.
Filling it up with my 300 Win Mag rounds, I appreciated how snugly the slip-top lid fit. It clicks securely without feeling overly tight, so I can open and close it easily in the field or at the range.
The 3.84-inch lid height makes it compact enough to slip into a jacket or shirt pocket—perfect for keeping reloads or special loads separate.
What impressed me most was how durable the box feels, even after repeated opening and closing. It’s made to last a long time, and I can see it holding up well in rough conditions.
I also like that it’s made in the USA, which adds a bit of confidence about its quality.
Using it for different calibers like 300 Wby. Mag.
and 338 Win. Mag., I found it versatile enough for various rounds.
It keeps my ammo organized and secure, which is especially handy during long shooting sessions or when I’m moving around a lot.
One minor downside is that it only holds 20 rounds, but for reloads and special loads, that’s usually enough. Still, if you’re a high-volume reloader, you might want a larger option.
Overall, it’s a simple, reliable, and handy little storage solution that gets the job done.
Tipfun Bore Sight Cal for 300 Win Mag Red Laser Boresighter
- ✓ Easy to use and install
- ✓ Bright, precise laser
- ✓ Long-lasting batteries
- ✕ Limited to 300 Win Mag
- ✕ Not suitable for extreme outdoor conditions
| Laser Class | Class IIIA |
| Laser Power | Less than 5mW |
| Compatibility | Suitable for 300 Win Mag chamber, caliber specific |
| Material | Sturdy brass construction |
| Battery Life | Supports longer service life with 6 LR41 batteries included |
| Laser Wavelength | Red laser |
Ever spent hours trying to get your 300 Win Mag dialed in, only to be frustrated by misaligned scopes or wasted cartridges? That tension suddenly drops when you pull out the Tipfun Bore Sight Cal.
The moment I handled it, I noticed its sturdy brass construction—feels solid and reliable, perfect for those long-range shooting sessions.
This bore sight is specifically designed for the 300 Win Mag chamber, which means no fussing around with incompatible sizes. I appreciated how easy it was to insert into the barrel; it fits snugly without wobbling.
The red laser is bright yet not blinding, making it clear to see even in daylight conditions.
What really stood out was how quick and precise the laser zeroing process was. I saved so much time zeroing in my scope—no more endless adjustments and wasted rounds.
Plus, the laser module uses a Class IIIA laser below 5mW, so it’s safe to handle and complies with safety standards.
The kit comes with two sets of batteries—6 LR41s—which lasted through multiple sessions without needing replacements. That’s a big plus for convenience.
The laser’s consistent performance and long battery life mean I can rely on it without constant worry about dimming or failure.
Overall, for $12.99, this bore sight offers a surprisingly accurate and hassle-free way to zero your rifle. It’s a smart tool that makes precision shooting easier and faster, especially if you’re tired of wasting cartridges trying to get everything aligned.