Speer .263 vs .264?

On their website they list the diameter as .264. Perhaps there is a misprint in the information you have look at or a calibration issue with your measuring equipment?
 
That's what I was guessing I was unsure as there was no mention of the diameter variances of it in looking at five reloading manuals. Does this variance stem from the older actions? Are all/most modern actions/barrels .264?
 
I measured a box of .264 Nosler Partitions (125 gr) once and they were smaller than .264 as well.

I didn't do it until well after I had shot a pile of deer and targets so I didn't worry about it.

Probably the metric thing.
 
Back
Top Bottom