Elk, the difference between the 44mm vs 50 is small, except in stature. Optically the FOV is really your only gain but as stated in most cases it is pretty moot when hunting for most individuals. I must swallow my pride and confess I like 50mm objectives on magnum rifles for looks in most cases but if it causes you to lift of the cheek plate than it will do you no good. I have a 44mm mounted on my 7 rem mag, it fits in med ring and just right for my shooting position. The 40mm is also mounted on med. rings b/c of bolt clear with the eye piece but it fits me better than lows. I have a number of 50mm scopes and previously felt they gave more advantage than a 40mm cousin which maybe true but in the Zeiss case both 44mm and 40 mm are plenty bright enough for any biggame hunting I will be doing.

Choice is yours though, if possible try a 50 vs 44 mm vs 40mm, pay attention to head position for shooting and you make the call.

Best of luck!