Groups going from 1/4" to 3"

[ianb1116]

Your 1x9 twist is too fast for the 50 gr bullet.

If you shoot at 300 yds or more, your groups will start to resemble shotgun patterns. While it may be accurate at 100 yds, at greater distance, it's start to spin out of control, causing greater shot dispersion.

Take a look at this chart under the heading ".224", to the right of the yellow highlighted column - which is the diameter of your 50 gr. bullet. It shows the suggested twist rate you should be using:

Attachment 97067

This chart can not be accurate, IMHO.

How is it that MIL shoots 62 and 77gr, both out of 1:7 barrels, when by this chart 62 gr is best suited fo 1:12?

Wasn't M855 (62gr.) developed at the transition of the M16a1 to A2 (1:12 twist to 1:7)?

http://www.rimfirecentral.com/forums...d.php?t=557097

Theres even a guy with the same rifle as OP shooting 50gr with excellent results.

Similar results here: http://www.ifish.net/board/showthread.php?t=445775

And here: http://forum.accurateshooter.com/thr...llets.3881234/

These were my first three results from googling the question.