Thread: Throat Erosion - New Barrel

So a couple of comments.

Were you shooting from a machine rest, or is it possible you just had a bad day ? How consistently did you get your 0.4 inch groups previously.

10 thou erosion for on;y 200 rounds is pretty harsh, even for throat burner like 6.5-06 / 6.5x284

How are you you getting getting your lands measurement. It is notoriously difficult to get repeatable / consistent lands measurements.

Originally Posted by ebf

So a couple of comments.

Were you shooting from a machine rest, or is it possible you just had a bad day ? How consistently did you get your 0.4 inch groups previously.

10 thou erosion for on;y 200 rounds is pretty harsh, even for throat burner like 6.5-06 / 6.5x284

How are you you getting getting your lands measurement. It is notoriously difficult to get repeatable / consistent lands measurements.

Yeah id expect 10 thou throat erosion per 100-200 rounds on something like a 26 nosler where theres a huge amount of powder, but it certainly sounds excessive for a 6.5-06. If that is the case (and not just a measuring mistake) i wonder if the barrel material could be 'softer' than normal?

Anyway, just seat you bullets longer to test grouping to find the new oal it likes and shoot away, and periodically test grouping at a few thou longer every couple of hundred rounds.