The best I could manage...
...since I don't do concrete well at all & my back won't allow me to work with heavy bags of cement anymore.
The next best choice has to be heavy wood construction.
First things first...the design...I went to the floor of the shop with chalk and some straight edges & squares.
I would have to buy a sheet of 3/4" plywood so I wanted as many layers of that sheet as I could manage in a thick top.
Yah...I'ma lefty shooter.
Next to design a framework, simple & strong...I had many 4x4's in the woodpile so I used them...
I figured I'd use them 'mortice & tennon'd', glued and dowell pinned together.
First, cut to length and make the joints...
Next to use that single sheet of plywood for the top...cut in 3 equal size pieces I laminated it together.
Cut it out the next day
and fit it to frame then sanded, stained & painted it and mounted it together.
I welded a c-clamp so I could use it for an umbrella mount, heated a piece of PVC for a holder & put them together with a thumb screw...
I forgot to mention that I live on a ridge and don't have a level spot on the property...I had to make legs that would level the bench.
Welded some 3" square pads to the bottom of the legs for a good footing...
That's the way she stands today, done a lot of shooting off her now and I think the change I'll make this spring will be to hire a poured concrete pad for it so sit on. Those legs have a little wiggle in them from side to side. It ain't much but 'any' is too much, I have a giant rock pulling the slack from the adjustable legs so I can lean on it an not change the scope on target.
I cut a bar stool at the right height and laid down a scrap piece of plywood for the stool legs.
It ain't perfect but it sure beats the way I started out a year and a half ago when I got into this BR shooting...
yes...that's a picnic table where I'm sighting in my first BR rifle of sorts...a MKII...