Here is what I'm using for my reloading bench. It's my welding bench that I bolted to the foundation wall. Made of all steel, it has
NO flex or give at all. There's enough room to work on, it's never going to catch on fire, and you could probably put a ton (quite literally) of bullets and other gear on it without an issue...
To the right is my ammo shelf. It too is steel with plywood back, sides, and doors. This pic is from before I put the doors on it. I am going to upgrade the doors and put locks on them when it gets nice enough outside again. I have rearranged it so that reloading supplies and equipment are now also on one of these shelves.