Try dropping the front sight as far down into the notch as you can and still see a tiny amount of the tip. Works for me at 100yds. Also, as yours is an adjustible sight version, flip the moving leaf over into it's cutout on the handguard.

The hard extraction seems to be a function of bolt fittment. Unlike front locking Mausers, the cam is on the bolt lug and in the receiver ring. I have smoothed up a few quite nicely before, but have not advanced my technique to anything cut and dried. Regardless, if you operate it vigorously, it ought not be a reliability issue. Not the best for bench work, though!