Many bench set-ups are designed for free-recoil shooting where the shooters body is located to the left or right of the rifle with minimal(or no support of the rifle). While you can achieve accuracy by compensating with a tighter hold with lighter recoiling rifles, it's more difficult with heavy recoiling rifles. The position of the body/shoulders determines straight-line recoil. I have found that when shooting from the bench(or any position, field or bench)) that getting "behind" the rifle with the shoulders perpendicular to the barrel while applying "firm and consistent" rearward pressure of the stock against shoulder using the grip in direct line with the barrel, will better control the rifle in recoil. The degree of rearward grip pressure can be determined by consistent group accuracy and precision on the target. Very little, to no cheek pressure(downward) on the stock, and straighter stock designs with less drop helps control barrel rise. While pulling on the fore-arm or scope with the off-hand may might help in controlling the rifle, it does add another pressure variable that has to be controlled. This could pose problems if the off hand is needed for rear bag/stock support. IMO.