Sierra 6.5 bullet question

[lutheran]

Hoping to get relative measurements on bearing surface lengths for the 107gr and 123gr bullets. I use a crude method that works for my purposes. Sticking the ogive into a sized case neck with your fingers and spinning it producing a "ring"(mark) then measure.

thanks
lutheran

 

[1shot]

I can't help you with the 107's but the 123's are .631 base to ogive and 1.303 OAL.
I hope this helps,
Lloyd