If Grizz notice you at distance longer than 50 m away, and you notice he is closing the 50 m distance, shoot at it, do not let it closer, regardless anything. If he is closer that 30 m do not shoot it but use a bear spray to drive it further away, and when it comes to 50 m you know what to do, guide around with machine-gun or not, and if you have no bear-spray the best is stub yourself in hearth twice and you will have no time for third time... At 35-50 m you have to read the situation.
I did not know Grizz are in NWT. Did you see it at close to Yukon?
