This what I have used for a long time with great results.
YMMV
With very light rifles, this front bag with a bunny ear, leather rear bag gives me the most consistent results across multiple rifles & calibers.
Filled with sand, & yes, it is
VERY heavy..........
With heavy, stiffer barreled rifles, lighter, smaller fronts rest work OK, but the Bulls Bag is just lest sensitive with everything.
MM