I have Talley LWs in low on my X2. Scope has a 1 inch tube and 42 obj and its just clearing so not sure if the lows will work with a 44. Might depend on the scope. Safe side I would say mediums if your going Talley LWs.
I also have an X2 with Talley lightweight lows, using a Meopta 6x42. Barely clears. 44mm wouldn't work. Bob