I'm a big fan of the Redfield Revolution 4-12x40 with the Accurange reticle.
the scopes can be found pretty cheap, weigh 13oz, and that Accurange reticle has handy reference marks for aiming at 100, 200, 300, 400.
my son and I use these on our Savage LWH 308's and love it. Loaded package is right at 7# at a very reasonable price.
we hope to use these to put 165gr Accubonds through elk lungs next month.
good luck to you sir.
shane