So I've pretty much decided I'm buying a Nightforce.. now how much of an advantage is the 56 over the 50mm objective. Should I get the 3.5-15 or the 5.5-22. Or my other option is a 3-18X42 IOR. What are the pros and cons of these options... The rifle is a 300 win mag necked down to 6.5mm. I'm hoping to reach 1000yds with this rifle it is a 24" varmint weight barrel. The IOR is a couple of hundred dollars cheaper but that isn't really enough to really swing my decision but your guy's opinions definately can... Any questions just ask.. I'll try to lay out my situation... Thanks for the help.