On my Ruger it has been a Sh!t show. I had some work done early in the year. New brake and cerakote. Initially I sighted in to discover the angle bolt wasn’t seated properly due to the magazine well guard being askew. The bolt plate was seated crooked, thanks to the guy who cerakoted it but I didn’t discover it until after sighting it in after the new brake. So I sighted in again after the fix to discover “my own fault” I used 2 different rounds. Buffalo bore 270’s and Hornady 270’s. My PH said 50 yards for the hippo and I shot a few at 100 to see where it would hit and noticed it was stupid high, 6-8” and the POI was stringing. Upon advice here I used a lead sled and gave the barrel ample time to cool thinking my barrel got too hot. I finally got it great at 100 in 5 rounds. I got to SA, took 2 rounds at 75 and it was good. After the buffalo we decided to play and shoot at Guinea on the range. I noticed again I was shooting really high at 100. I let it cool for a long time and took 2 shots at 50 and it was way off. Took 2 more at 100 and it was high and left and low and left. All the torques were triple checked on the rifle and scope.
So only after my PH and I got to talking I realized there were discrepancies in the bluing after the initial modifications. My PH seems to think the barrel was made too hot and possibly changed the temper of the barrel by the gunsmith. Note: I had severe issues with this gun smith. I was told the mod would take a week and in fact it took him almost 4 months. I told him I was going to pick up my rifle and he magically advised he would have it done in 2 days. Also, upon picking up the rifle I found the trigger spring to be installed wrong.
After returning from Africa I’ve just decided I’m done with that rifle and fighting an issue that I have tried from every angle to fix and I don’t know what the issue is.