Took the 7.62x39 out today to get the Troy rear sight dialed in.

After crunching some numbers on JBM it looked like a 39-yard zero would keep the trajectory within 2 inches of LOS out to 200 yards. Here's the trajectory table:

[Linked Image]

I was surprised at 39 yards it was shooting under 1" three shot groups.

When I went to 100 yards, it opened up to about 4", for 9 of 10, with one high flier out of the group. I guess that is what low quality (poorly balanced?) bullets do. My 100 yard group was about right for predicted traj of +1.9". But I did refine windage left a couple clicks. My 100 yard group with the irons was about the same size I shot using the optics earlier on.

100 yard target, 10 rounds,

[Linked Image]


I was shooting off a table with a bipod up front, and a beanbag aft.

At 165 yards I was smacking a basketball size rock no problem, traj was right on. For S&G, I tried hitting some stuff out around 400-600 yards. I used the big aperture and held the post above center. Not bad results at 300-400, but at 600 It was at best 'suppressing fire'.