A Leupold VX-6HD 3-18 or 4-24 would be pretty good options, around 20ish ounces. The Nightforce NX-8 2.5-20 is a good optic, comes in at 28 oz I believe. If you shop around, you can find a March 2.5-25x52, that is what I have on one of my rifles, and I love it. 25 oz, illuminated reticle, fantastic glass, tracking is awesome, ridiculous amount of elevation adjustment, and a nice compact form factor. On the higher end of your budget, but it is the top light weight hunting optic in my opinion, here it is on my 9 lb 338 nm
The new razor hd lht 3-15x42 is a great optic. 19oz locking elevation, covered windage, illuminated. Glass is pretty dang good. If you want ffp, mk5hd 3.6-18x44 is 25oz. A little know optic that I purchased for 700$ on a whim, the Hawke 4-20x50 frontier ffp 30mm, is a very good scope for the money. Very clear bright glass, locking windage and elevation, illuminated, compact and weighs 23oz.