I had been having some troubles with accuracy with my Contender on the bench. It used to shoot sub 1/2 MOA as the norm. It had loosened up quite a bit. I finally realized that it started that when I got a new improved front bag and didn't use the rear bag anymore. I shot a few groups last weekend with a rear bag under the grip and got some nice groups again. The best was a little under 3/8". I am not a competition shooter, so this made me happy. This might just be me (I may not be as steady as I used to be), but thought I would pass it along.
mike