Devils advocate

[bj139]

I kind of wanted to do a 25 grendel based on the same bullets sharps loads for their 25x45 but I didn't cause it really doesn't give me anything the grendel doesn't already do for me.

As far as 556 vs 6.5 I choose the 6.5 and sold all my 556 guns, just something about 100 grain and higher weight bullets that trip my trigger that 55 throw 80 grains doesnt.

The bullet diameter difference between 6.5mm and 25cal is .007".
Combined with the better bullets available in 6.5mm it hardly seems worthwhile as you stated.
Between 6mm and 25cal is .014", double the difference.