i dont like the rugs for a storage solution, mainly do to the possible rust problems presented. for storage i have several layers of shelfs in the top of my safe, all close to each other, and i keep the barrels not mounted on frames up there...
My shelf isn't near big enough!! I have been chopping off my kids old blue jeans and hemming the cut off end together to make an 18 inch long bag and I store one scoped barrel in each so they are close together and don't get scuffed. The cloth breathes and is better than the cases for me... cbagman