I'm trying to better understand rifle weight -vs- "shootability", for lack of a better word.

My AR-15, scoped & unloaded, weighs 9.42lbs. It doesn't feel "heavy" at all.

My AR-10, scoped and unloaded, weighs 12.21lbs. It feels heavy.

My Remington 700P, scoped & unloaded, with a bipod, tips the scales at 12.92lbs, and feels REALLY heavy.

This little Olympic, K9GL, scoped & unloaded, is 9.33lbs -- which makes it less than my AR-15, but it feels heavier.

This SDI AR-15, scoped & unloaded, is 6.67lbs and feels extremely lightweight.

Oddly, my Ruger K10/22T, scoped & unloaded, is 7.98lbs, but since the weight is all in the bbl, you'd guess it was heavier.

So, my question is, is weight really much of a factor? Or is it all about balance?

I kind of have it in my head that a scoped rifle should weight about 10lbs or less.

Is there some magic-number that experienced shooters have found? Such as <8lbs is too light, and >10lbs is too heavy for offhand shooting in the field?

Mike