Change in Point of Impact with different rounds

[hals1]

I have been wondering how much difference there is in poi when switching between M193 and M855 with a 16". I have a BCM and a PSA middie and a BCM 20".
I realize the answer is going to vary from gun to gun, but can I expect to stay on the paper at 100 yards?

[Beat Trash]

With my 16" guns, (Five in all) the difference between shooting M855 62 gr ammunition and M193 55 gr ammunition at 10 yds is about 2 inches or so. I don't have the exact number off the top of my head, as it's raining out and my coffee is still hot.

You should definitely be on paper.

You would also see a difference within the same bullet weight if you went from shooting 55 gr bullets in 223 vs 5.56mm loadings.

My advice is to pick a bullet weight/loading and stick with it. Then this becomes a non-issue.