Lots of big fancy words, I'll try to present this clear. I will stipulate that my present constant to this equation is AVS slugs. I use those exclusively as all others I used basically, were poor on grouping. Steve fits his to the barrel groove. Do I buy that reasoning? For now, yes. Now to the point at hand, while I'm trying different slug weights, the gun shoot, "violent" for lack of a better word. I got decent groups, but not exciting ones. Now this is where we differ in theory, I believe using a slug at whatever weight, not super light. for my discussion, a 35g slug in 25 cal. which shot no better than the rest, UNTIL I pushed it to 970 FPS, then, magic, the gun seemed to strain less, smoother firing, and the slugs were just lobbing in at 1 MOA at 100 yards with little effort. You could feel it as you shot. Now here is the wrinkle, I believe that the same can be attained with say, a heavier slug, but would have to be pushed at that same velocity! Now attaining certain velocities with heavier slugs is a real challenge, so.....
My partner in crime theorizes that barrel harmonics rotates in and out of harmony as you lower velocity, in my example, 970 with a 35g succeeded, but that was the very end of our last ever range visit and I never got to prove this. I was going to lower HST and thereby velocity 5-10 FPS from 970 until say 870 and see if that same smooth harmonic cycled back into sequence to give that same smooth function. Theoretically, allowing heavier slug use as it's more easy to push a slug at 910 instead of 970. Now, when I do arrainge shooting sessions, I will put this theory to the test.
My partner in crime theorizes that barrel harmonics rotates in and out of harmony as you lower velocity, in my example, 970 with a 35g succeeded, but that was the very end of our last ever range visit and I never got to prove this. I was going to lower HST and thereby velocity 5-10 FPS from 970 until say 870 and see if that same smooth harmonic cycled back into sequence to give that same smooth function. Theoretically, allowing heavier slug use as it's more easy to push a slug at 910 instead of 970. Now, when I do arrainge shooting sessions, I will put this theory to the test.
