This is why I normally refrain from engaging in a peeing contest. It’s interesting that you mention pressure tracing. The testing I have done and seen from others indicates big variances in chamber pressure. My experiences with tuners has been much like many others. Trigger, trigger fall consistency, trigger timing, brass consistency, primers, powder, friction, heat, and a host of other things cause barrel harmonics and dynamic changes within the barrel, shot after shot. Even with match primers, the abundance of pressure trace data illustrates that you can run a test on 10 different primers one day and get different info the next day. A powder manufacturer assured me that nobody would ever calculate the surface area of every kernel in a load, but weighing powder is the best we can do. Just because the weight indicates the same, that does not mean the square inch area of exposed powder is the same. Mass versus surface is not exactly the same, shot to shot. You nor anyone else knows what variable may come up on the next shot. Although small, they are variables. Pressure Trace indicates this with the wide swings in pressure. One shooter may experience 5,000 psi high to low. The next guy could experience up to 7,000 psi, and some have seen a bad primer lose 10,000 psi from the high. These are match primers. We are not talking 60 years ago stuff as you mention. I have seen guys make a tuner adjustment (one builds tuners and win matches), yet he says, where the heck did that come from. You tell me how you know exactly where to move a tuner in the middle of a match that will compensate for the variables that you are not even aware of. I've done plenty of testing on barrel harmonics and counting pixels. We have a patent pending on a pressure regulating device that could show some promise. Air gun guys figured this out long ago. Now they use regulators. I realize mixing air guns with a powder burner is apples to oranges, but it gets to the point that its really a pressure thing, shot to shot, causing much of our problems. Folks are doing the best with what we have and may I say, doing well! If folks want to use tuners, go for it. I hope it works for you. Its not my inability to know what to do with a tuner. Thats why I don't use one. We sure don't need to make out like it's the magic bullet! I often can widen the node with just a 2-3 oz weight and do my load develop. That's no magic bullet either and that's why probably nobody on this thread is winning every
