Anyone care to guess how many shots in this one?
A guess is all that would be possible, it's more than you can count by the visible evidence.
That lone hole to the left, was the first shot from a cold clean bore. Landed out of the group, in this instance
.
There is something else slightly unusual about that group, too. Which is, the whole group, was fired with the same, single piece of brass. Lapua Match .223 was brand new, had just barely become available. I'd been sent a sample for evaluation. I was loading a single piece over and over to see how long the primer pocket would last with my working load for the .17 Predator, launching 30 Gold's at just under 4,100 fps.
So... Eight shots. A seven and one group. Primer pocket was starting to get a bit loose - not terrible, but noticeably loosening. So I called it good rather than invite gas cutting the bolt face.
That first shot out of the group, isn't repeatable with that rifle. Usually doesn't happen. Most times, first shot from a cold clean bore lands right in the group with the rest of them. Not that time though!
- DAA