I posted farther up the thread, writing about my Predator in Creedmoor.
I opened the mag front. It feeds great now. Thanks for the fast fix idea.
I also opened up the barrel channel more. A lot.
I went to the range this morning. In the pic, I shot at the left dot first. The rifle is still grouping the same. Shots 1,3, and 5 went into about 7/10. Last time out I had the same shot numbers go into the .5s and .6s. This is from a rest and only touching the rear bag and a very touch on the pistol grip.
Then I shot the dot to the right (after the barrel cooled.), but this time holding the forearm. The same pattern, with shots 1,3, and 5 going into about 4/10. The flyers went left with this hold. Every other trip to the range, the targets have looked just like the first dot.
I guess this could be something in my shooting technique, but it sure seems repeatable! I was thinking the larger free float might do the trick.
With my last four shots, I held one mil low on the reticle and gave the rifle a hard grip, forearm and pistol grip. The first three shots were in the .3s, then I don't know what happened to the fourth. (It felt good.)
I guess the next step is to stiffen the forearm like in the post above.
The other group in the pic is a different rifle and can be ignored.