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This. Have you shot any factory ammo yet? FGMM? What's it grouping like with some of the best factory match ammo you can find?Hi Mr. DIYguy,
Call me Captain Obvious but ... you have checked the scope rings and tried a different scope, right? And you know that your barrel nut is tight in the upper? It is also possible that your bullets touch your flash suppressor - yeah, it can happen. I'm sorry to ask about such basic stuff but I didn't see anything about those anywhere above. You may have rockin' reloads but the barrel and scope reticle may not consistently point to the same spot.
What about the results on target? How was the factory ammo grouping?Regarding factory ammo, yup. With every new firearm I always start with factory ammo and chrono the good stuff to get a benchmark of performance and velocity. I'm attaching a copy of my log which documents most of the results from the trips to the range with the Labradar including the factory loads. I know there are some data junkies out there so it also shows the effect on temperature and velocity.
I use QuickLoad to help with the initial process of finding the alleged optimal load, not perfect but helps give a recommendation and shorten the process. For my 18" barrel the Optimum Barrel Time is Node #5 at .9245. Based on that formula optimal velocity at 35 degrees should be 2,726 fps. Attaching a screen shot for those that aren't familiar.