OK, before we start, I am not talking about significant headspace variability which can cause significant case stretch and case head separation.
The question here is effects on precision/accuracy. So, say for example we are getting a 3 thousands spread on bumping, I would think that this means even if the bullet was seated absolutely perfectly in terms of depth, the 3 thousands spread in headspace would allow the bullet to seat in the chamber with a 3 thousands spread and thus consequently a 3 thousands spread in terms of distance from the lands and the crown. To keep things simple, let’s assuming that we are seating to mag length and not slightly off or jamming into the lands, so avoiding that complication.
So what is the consequence of this 3 thousands spread? I assume that it would possibly mean a 3 thousands spread in when the bullet exits the crown (assuming absolute consistency in MV), does this have any effect on precision/accuracy and why?
The question here is effects on precision/accuracy. So, say for example we are getting a 3 thousands spread on bumping, I would think that this means even if the bullet was seated absolutely perfectly in terms of depth, the 3 thousands spread in headspace would allow the bullet to seat in the chamber with a 3 thousands spread and thus consequently a 3 thousands spread in terms of distance from the lands and the crown. To keep things simple, let’s assuming that we are seating to mag length and not slightly off or jamming into the lands, so avoiding that complication.
So what is the consequence of this 3 thousands spread? I assume that it would possibly mean a 3 thousands spread in when the bullet exits the crown (assuming absolute consistency in MV), does this have any effect on precision/accuracy and why?