If you "plan" on hunting a Montana bighorn ram you should start now. I have been applying since I was in college, 37 years ago, and haven't been drawn.
The system in Montana is not like Colorado's or some other states, where with a certain number of points you're guaranteed a tag. Each year's additional points only provide more chances in the drawing. It's like buying more lottery tickets, not like moving closer to the front of the line.