Man! Whatta PITA! Grab the dynomometer and chain hoist, go into the small shop, back off the turret nuts a 1/4", hoist the turret just clear, and take a reading. Before breakfast? Whatta PITA.
Wait. That figure won't do you any good because I have a slotter head on the other end of the ram. Whew!
I'm gonna take a WAG at 700 lb. That's a guess, not an actual verifiable figure. OK. Who has an actual weight you can take to the bank? How close was I?
Note: Different make turret mills may vary in total assembled turret weight - that includes turret, ram, and head. In most turret mills there's a lifting bolt hole in the ram. Use it to lift the turret but slide the ram to level the turret.
YMMV according to make and relative weight of major components. If you ship the turret separetely make a fitted pallet that captures the turret base diameter, ram dovetails, and spindle quill. Don't cheap out on the labor and lumber. The assembled turret can be damaged it slides into a hard stop against something solid especiallly the head.
Personally, I think removing the turret is more work that it's worth unless you have to move the machine in an under-capacity rig making two trips. I suggest if your rig has the load capacity, you move the machine intact. Lower the knee all the way and block it and tilt the head 180 so the motor is under the ram. That way you have only one heavy thing to move, load, haul, unload, move, and spot instead of two and the GG has been lowerd by a foot.
No matter how you move the machine, move it on a heavy bolted timber skid with the machine's base bolted to it. Remember you are only one minor bump away from an overturned machine and a bunch of busted furniture. It's a PITA but skid, secure, and shore machine tools being transported. You will be glad you did your next hard stop to avoid somone running a stop sign.