Well shit!
Then I suggest the reincarnation of the USA made Dog Gone Good bags made by Armageddon Gear. They took over production after the DGG bag guy retired. Still USA made.
The medium DGG one I have is way, way, way tougher than the cheapies out there. IMHO the medium is the way to go, but I shoot only up to 308.
Look like they currently make slightly smaller versions of both the medium and large bags.
DGG made a bunch of bags, including a monster large one and window versions for shooting out of a truck.
Armageddon medium (black, camo, tan)
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DGG medium
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For filler, this is what DGG had to say:
“Bag Filler
Bags can be shipped empty, or filled at the factory for a small fee. Filled bags also require an extra $5 packaging fee. The bags can be filled with polypropylene regrind which can be found where plastic is recycled (check yellow pages under lastic). Large bags will weigh about 22 lbs., medium bags about 13 lbs, small bags will weigh about 10 lbs. Ground walnut tumbling media will weigh about the same as polypropylene. Sand will weigh 60 lbs. in the large bag and about 45 lbs. in the medium, and the small bag will weigh about 30 lbs. For a light weight filling Buckwheat hulls can be obtained at a feed store and the large bag will weigh 6 lbs., and the small bag will weigh less than 3 lbs.”
I would never use sand in a bag like this. Way too heavy. Not sure what material AG uses to fill them.
Mine is factory filled with poly regrind from DGG and it’s awesome. Locks the gun in. Keep in mind the AG bags are slightly smaller so may weight a bit less when filled.
If you value your time or sanity at all, have AG fill the bag for you and pay extra for shipping. Seriously.
If you’d like to see the full range that DGG offered in the day, here is a link to the old DGG site that is archived.
Pro tip: if you need the bag higher on the bench, a lightweight but stable solution is to use those hard-ish firm knee pad rectangles for gardeners. Here are mine I use. The pad handles are nice to grab to slide the rifle & pads around as one unit. I use from 2 to 4 pads on my setups.
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My setup. I’m not a free recoil sort of shooter and want the gun locked in. The DGG bag is peeled open and the gun is snugged into the X. Push it down and the thing turns into one unit…bag and rifle. Solid!
Initially I used 3/4” slabs of maple for spacers. FUCK that got heavy shlepping around!