That Simmons scope is a beast. It's long and heavy, and you'd definitely need high or even extra high mounts to clear the hammer on your gun in the rear, and to clear the barrel in the front. It's 15" long and weighs 22 oz, almost 1.5 lbs. With the high narrow receiver on your 94, coupled with the need for the high mounts and the scope being high and heavy, I think that keeping the gun from canting to one side or the other while shooting, even on a bench, is going to be an issue. You might drop a little magnification and go with a 40mm objective lense for a smaller, lighter scope, to get the center of gravity closer to the center point of the rifle. Cabela's sells the Whitetail Classic in 2-10x44 (a little bit lower mount) or the 3.5-10x40 (lower still), both for about $100. Looking through a 10x scope at 250 yds (long shot for a 30-30), is like looking at a target at 25 yards with no magnification. If you can spend more money and want more than 10x, I'd seriously consider the Cabela's Alaskan Guide Compact 3-12x32 scope for $230. Plenty of power, compact package for your rifle. You could get by with low or medium mounts too.
Up until recently, most of the snipers in the military shot fixed 10x scopes, enough power for shots much longer than the 30-30 will handle accurately. The new scope for the Marines is supposed to be the Schmidt & Bender 3-12 variable, from what I've been reading. I think that 10x-12x would give you all that you need and want.
If the Simmons 6.5x20 is what you want, by all means, get it and be happy.
I just don't think you'll be happy with it on your lever action gun. On heavy barrel 22-250, sure. On a trim gun like yours (even with the long barrel), I think that the gun would handle like a piece of 4x4 lumber.
