And an unstable bullet is in tune? I respectfully disagree.
It has been a long time but I will try. He was taking some shortcuts with his reloading, not properly attending to some details, getting in a hurry instead of slowing down and getting it as perfect as he could. At 100 yards he was shooting over a couple of flags and the near one, the most important one, had been damaged so that it did not work properly and he had not bothered to to fix it. On his actual shooting of the rifle, he was not following through. There were other things, but as I said it has been years. For you, I suggest a couple of things. Do some dry fire work at the range, paying close attention to how the way you pull the trigger shows up as reticle movement on the target. A friend was having trouble breaking into the ones until dry fire showed him that his trigger pull was the problem. After he fixed that, it solved his problem. Wind flags can have us snatching at very light triggers to catch a fleeting condition. Even with a 2 oz trigger we need to squeeze it rather than pulse it. Shooting free, rifle balance and bags are very important. Years ago I took a little more than an inch off of my barrels in pursuit of better balance for shooting free recoil,. It worked. If your rifle does not have enough weight on the rear bag, and/or the fill in your ears is too much or too little it will have a negative effect on consistency. The list goes on......Little things add up, which is what happened to my friend. After we had him fixed, I had him write it all down, because my experience with helping fellows solve problems is that they would forget the details over time and go back to the ways that caused the problem. I have one suggestion for you. Get a cell phone tripod adapter (Mine cost $10 from Amazon.) and video yourself shooting on a regular basis. If you keep doing the same things your results will remain the same. How do you tune a load? Are you loading at the range?
When a bullet is in the barrel,it rotates around the center of mass...when the bullet leaves the barrel,it rotates around the center of gravity...HOPEFULLY they're the same. Also,while in the barrel the thrust is at the rear of the bullet...when the bullet leaves the barrel there is a reverse thrust to the nose of the bullet...rapid deceleration called drag. Many things can cause a bullet to be unstable even after it leaves the crown including the crown. Also, jumping bullets can cause bullets to deform(become unbalanced) going into the rifling. The rifling will not correct that deformation....garbage in...garbage out.
We are talking about tune. Does powder charge affect bullet rotation? Does powder charge effect when the bullet leaves the barrel. What about seating depth? What about bullet design and rifle twist. All of these things have to do with tuning. They all affect what the hole looks like. That’s my explanation based on my experience.
You and I will disagree. I can clearly tell when my gun is in tune or not by the shape of my bullet holes. A nice cylindrical burn mark along the ID of the hole is good indicator that things are looking up. Oblong in any way..,not so good.
@speedygonzalez has/had a series of pictures showing various group shapes but I haven't been able to find an explanation of what they mean. Does anyone know where an explanation is located? He may have talked about bullet hole interpretation too.
Jack Neary has been giving talks about this for years.
Gary Ocock....knows his stuff. Listen.
It was Jack Neary. But what does he know? Right?
www.precisionriflemedia.com
so how can the rifle be in tune but not group….
how does that make a gun in tune….. recoil
Not really sure. It's just that when the gun is in tune and shooting well the crosshairs return very close to your aiming point when you're setup is right.
I have a saying that goes……”there are only a few things that will compel a bullet to take the exact same path to the target as the one before, but an untold number of things that will make it go astray”.
