Anyone using these on their 700? 42 MM objective lense, Nikon, medium or low mount?

Lows may work; however, I usually use mediums.

Lows may work; however, I usually use mediums.

X-Low will clear, so it's up to you how high you want it.

I have a 700 BDL with DNZ 1 piece mediums that I've had both 44mm and 50mm Meoptas mounted in. I would bet you would be fine with the lows.

I know for sure lows will work.

Lows work great for me with a Conquest 3-9x40

Measure the actual outside diameter and include diameter of flip caps if you use them. The following holds true for both 1-inch and 30mm tubes:

low will clear receiver up to 49.8mm diameter
med will clear receiver up to 56.3mm diameter
high will clear receiver up to 62.4mm diameter

x-low will clear receiver up to 45.7mm diameter - available in 1-inch only

Since most barrels are smaller diameter than the receiver, you can 10mm to the diameter to clear the barrel.