Both should be great for 400 yards. I recommend going to your sporting good store where they have both scopes and asking if you can take them outside and glass. You could also do this around sunset. cabelas etc ….. you can glass the mounts they have in the store. You are going to get a million opinions. I go for the scope that my eyes like. Sometimes it is a trial an error process as well.Right on. Right now I’m comfortable out to 400ish yards. I plan on Doing some good practice once I move out there and have more space. I’m on the fence between the vortex razor 4.5-22 or the leupold vx6hd 4-24. I don’t knock vortex because I’ve hunted with them before and they are great glass. However I’m curious if the extra cost with leupold is going towards the name or the actual performance.