Normally called fouling rounds I would guess it depends on the ammunition. Maybe five rounds or maybe ten. Powder and bullet will eventually settle in to as good as it is going to get.I understand that for best accuracy in a .22 firearm you should shoot a few rounds through it to "dirty" the barrel. Question is how many rounds do you think would be enough?
Thanks
JJ
I have also found that when changing brands and on some guns the type of ammo in the same brand to require another few rounds of "fouling" to get things settled in again.
There's the right answer right there...Every gun varies. I'll suggest you clean your barrel, then slowly fire shot groups until they tighten up to the point that you don't see improvement from one group to the next.
Amen to this, drove me nuts until I figured it out. The very greasy Wolf was throwing things out of whack. Stick with something though and things would settle down.If you are accuracy testing ammo, you want to clean the barrel when swapping brands. ...........
I only run an oil patch on my 22 firearms and a dry patch never have cleaned them. As far as the actions every few hundred rounds only.