What is your favorite scope 100yds

I like 30x for 100y Target shooting. But I would probably not say no to 50x or even better, the March 8-80x 

But realisticly, I have only owned 30x and it was OK. Just remember that if you intend to drag your gun along a high power scope can be very heavy and cumbersome. If it is a bench rifle then weight does not matter. 

If your looking for a cheap Target scope then you might want to check out the SWFA 20x42 scope.

I was using a Delta Optical Titanium 4,5-30x50, that is the only scope I have used for 100m so far. 

The good old standard would be the Weaver T series in either 24 pr 36 power. Fairly light weight for their magnification and very reproducible adjustments. 

I'm using a Mueller 8-32X44 target dot scope. For a scope in this price range, the optics is very clear and the cross hair reticle is about the right thickness. I think it's just as good as the Weaver T series. Amazon has them for $216.

Aeon scopes I really do enjoy. Good to go over 100 yards. If you get the right scope.

I've tried a series of Hawkes and Optisan scopes and now have a Nikko Diamond Sterling 10-50x60 on my Impact. Crystal clear at full magnification at 100 yds.
You can usually get a good deal on these used on Yellow.

If one needed something now, the Sightron are nice (though they are 1/4 MOA vs Nikko's 1/8 MOA adjustments. The Leopold Gold Ring series is also very clear at high magnification at 100 (have hose on my powder burners).

I have to agree with Tony R on the weight if you going to carry it around. My highest power scope is 34x but it's for bench shooting. 

I'm comfortable doing 100 yd shot with a 14 or 16x when it comes to carrying it all day on a hunting trip. At that distance there's a good chance I'll get a follow up shot. 

You'll definitely need to factor in what your going to use the gun mostly for.

I use the SWFA fixed 12x scope and shot beercans at 100y yesterday. No problem at all. I have not test tried paper punching at 100 with 12x though.