Just wondering what you guys/gals prefer shooting with while on a bench, a bipod or a sandbag?

I went to the range today to see how well my Remington 700 Classic 280 Rem. shot 140 gr. Federal Fusion's. It was zeroed with Remington 140 gr. Core-Lokt's.

With both loads I was shooting 2 to 2 1/2 inch groups shooting off my sandbags (w/small rear bag), which is extremely bad for this rifle. Then I put my short bipod on it and my groups were just a tad under an inch with the Fusion's. I never thought there'd be that much of a difference between a bipod and sandbags.

NYH1.