260 Rem Freebore

[JEC]

Am having a "brain freeze" in reamer specs for a 260 Rem and would like some input. I would like to shoot 120 SMK's with the shoulder of the boattail just forward of the neck/shoulder junction on the brass (to avoid putting any of the bullet's bearing surface into the "donut" area). What freebore would you recommend?

 

[Mike Bryant]

Seat two or three dummy rounds where you want them and send them to the reamer maker. You can get close enough by setting a 1" micrometer .001" below bullet diameter and sliding it down the seated bullet. Then measure from the end of the neck to where the micrometer stops with a caliper.