Reply to Thread

Message

<blockquote data-quote="thor447" data-source="post: 3715925" data-attributes="member: 24867">These are used for the Hornady O.A.L gauge (I hate that name because it isn&#039;t measuring OAL, but rather CBTO).&nbsp; The neck is sized out to that of a fired case, that allows a projectile to slide in easily.&nbsp; The threaded base of the case connects to the Hornady OAL gauge.&nbsp; You seat the bullet very deep into the case, put it in the chamber, and use a rod on the back end of the gauge to push the bullet out until it hits the lands.&nbsp; You then set the ram in that position and pull the assembly back out.&nbsp; You can set the bullet back in the modified case until it contacts the ram.&nbsp; That seating depth is CBTO max before jamming into the lands.&nbsp; It&#039;s really only needed one time per rifle, unless you want to measure throat erosion.&nbsp; I just use these on my rifles to figure out max seating depth for load development, then use that as the base CBTO measurement before seating for bullet jump.[MEDIA=youtube]z7UL2oWOxgM[/MEDIA]</blockquote>

[QUOTE="thor447, post: 3715925, member: 24867"] These are used for the Hornady O.A.L gauge (I hate that name because it isn't measuring OAL, but rather CBTO). The neck is sized out to that of a fired case, that allows a projectile to slide in easily. The threaded base of the case connects to the Hornady OAL gauge. You seat the bullet very deep into the case, put it in the chamber, and use a rod on the back end of the gauge to push the bullet out until it hits the lands. You then set the ram in that position and pull the assembly back out. You can set the bullet back in the modified case until it contacts the ram. That seating depth is CBTO max before jamming into the lands. It's really only needed one time per rifle, unless you want to measure throat erosion. I just use these on my rifles to figure out max seating depth for load development, then use that as the base CBTO measurement before seating for bullet jump. [MEDIA=youtube]z7UL2oWOxgM[/MEDIA] [/QUOTE]

Verification