RE: Shooting Bags
My shooting bench is a Black & Decker WorkMate that's about 25 years old, I sit on a 5 gal bucket with a boat cushion on top and the shooting rest is one made by Outers, I bought it back in the 80s...As long as you make sure the WorkMate is on solid ground you can shoot some great groups...
I have also shot off a 50lb bag of corn and with my centerfire sometimes I just put the bipod on and use it as a rest...