I was browsing the Harbor Freight website today and ran across this one, the reviews look good. If you have one, please reply with your thoughts...
https://www.harborfreight.com/9800-weatherproof-protective-rifle-case-long-64520.html
APACHE
9800 Weatherproof Protective Rifle Case - Long
Protect rifles, shotguns, handguns and other specialized equipment with this exceptionally rugged Apache® weatherproof storage case. Constructed from extremely durable polypropylene, this professional quality hard case takes a beating while protecting the contents from impact, moisture and microscopic dust. The built-in purge valve equalizes pressure so you can open the case after changing elevations.
https://www.harborfreight.com/9800-weatherproof-protective-rifle-case-long-64520.html
APACHE
9800 Weatherproof Protective Rifle Case - Long
Protect rifles, shotguns, handguns and other specialized equipment with this exceptionally rugged Apache® weatherproof storage case. Constructed from extremely durable polypropylene, this professional quality hard case takes a beating while protecting the contents from impact, moisture and microscopic dust. The built-in purge valve equalizes pressure so you can open the case after changing elevations.
- IP65 Rated- watertight and dustproof
- Pick-and-pull foam insert for impact-absorbing protection
- Strong, secure, easy-open latches
- Adjustable pressure relief valve equalizes pressure for easy opening
- Pre-drilled for two padlocks (locks sold separately)
- Super strong reinforced polypropylene construction
- Interior dimensions: 50-3/8 in. x 13-5/8 in. x 5-1/8 in.