Jim, this is what you want/need:
http://www.opticsplanet.net/shooter-s-ridge-zero-kick-rifle-rest-shot-or-weights.htmlUsing it is much more "natural" than the Lead Sled. The strap which holds the rifle butt
in place is not noticeable when shooting, nor does it keep the butt away from your
shoulder the way the Sled does. Add a 25# barbell weight is all that's needed (it still
allows SOME kick which hasn't harmed any of my stocks). Few rests feature a horizontal
adjustment, but this has it as well as the vertical adjustment.
My 7mmWSM and Sav 10MLII could get pretty brutal after a few shots at the firing
range, but I can now shoot either, or both, all day without feeling beaten. It also
eliminates shooter-caused "fliers" completely (well, 99% of them anyway).
As for shooting differently off the bench than in the field, I use a shooting stick and
points of contact with the stock are close to identical in either case. The game haven't
noticed the difference.
P.S. Hmmmm.......just noticed that Optic Planet's "Product Info" doesn't mention the
horizontal adjustment feature, but if you click to enlarge image, the aluminum colored
knob on the front rest is what is used to adjust horizontally.