Clos, the scope you have is pretty heavy. If you lite weight the rest of the rifle yet leave weight up top the imbalance will pronounce itself rather harshly. Trust me bud....been there done all that.
Then I did myself a really big favor and started reading a lot on the forum about " lite done right " and saved myself a lot of money spent trying to learn what I inevitably discovered I didn't want.
All I'm saying is if you want lite you want " lite done right "
Realistically you need to change just about every part of you're rifle to get where you want to be.
I damned need parted out my heavy 280AI but instead I put it in the back of the closet for about a year. When I pulled it back out and started playing around with it again I never would have imagined how glad I was not to have parted out this fine shooting rifle all for pennies on the dollar.
It really is a fine rifle and it sure sounds like yours is to.
Shod
