Hell, in my case I'd be adding a full HALF pound to my Kimber! It's got a 12 oz Swarovski on it now.
One reason, and one only, to do that: to increase the utility of the rifle. Mine is a 7 WSM with a Pac-Nor tube; it's very accurate. If a scope change gained me 100 yards of "reach" that opens up huge swaths of terrain. Currently, dialing the Swaro, it's a 550 yard hunting rifle.
Whether a very precise dialing scope actually could do that for me is totally up for debate, but I'd like to try!
However, at 8-1/2" from objective bell flare to ocular, that is almost 3/4" shorter than my Swaro- 3/4" farther from my eye I mean. I don't think that'll work unless they've understated the ER spec on the SHV.