I slugged it twice to be sure and it is .260. I have a bullet sizing die from C&H to take .264 down to .260, he actually had it on the shelf. He had the 6.5x58R Sauer on the shelf also, great outfit to do business with, nice dies. The company has changed hands a few times over the years, I've used their presses and dies since the 1970's.

After the first shot the rest are just noise.

Make mine a Minaska

Heaven has walls and rules, H-ll has open borders