--- In BULLSEYESHOOTERS@yahoogroups.com, "speedy94301"
<speedy94301@...> wrote:
>
> The past ten years I've been plinking with an old 45 cal stainless
barrel that's been used
> through several jungles, as it has some patches of worn lands. The
interesting thing is that
> after I put 15-25 rounds of ball through it after cleaning, it starts
to show good accuracy.
> Does anyone know why the old barrel becomes accurate after I shoot
some rounds through
> it? Fitting a new stainless steel match barrel as my summer
project. But saving the old
> barrel too for hardball ammo.
>

Even with new barrels, when cleaned they will usually shoot differently
for a few rounds until bore condition becomes normalized by powder and
bullet metal fouling. After that, things should be constant for
awhile.