I remember seeing those Bulls Bags as well. However, here are some specs off of their site (which, btw, weirdly has some non-secure pages i.e. not SSL):
- Material is 600 Polyester w/UV coating (Moisture resistant)
- Filled bags apparently come from the factory filled with cat litter?
Cat litter absorbs moisture. Bad. This is very bad. A 15lbs bag of cat litter that is soaked is gonna weigh a metric ton and really strain the fabric, especially if dropped.
Dog Gone Good bags contain “polypropylene re-grind”, which doesn’t absorb appreciable amounts of water.
I’m also thinking DDG bag’s 1000d Cordura is better than 600 Poly, but I may be mistaken. Cordura is nylon, which absorbs a tiny amount of water vs Poly, but nylon is said to be stronger per weight. I’ll let fabric experts have the final say.
I’ve thrown my DDG bag around aggressively (as in frustration, as hard as I could, from shoulder height to the ground) because it’s a pain in the ass being so heavy. No damage, no popped seems, blown sidewalls, etc like I’ve read about with Caldwell bags. I do note I haven’t read anything, good or bad, about Bulls Bags.
I love the DDG and hate it because, well, it’s not light like a bipod, right? But it does some things better.