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Rifles, Reloading, Optics, Equipment
Reloading
COAL using CBTO from Hornady OAL gauge significantly shorter than book COAL?
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<blockquote data-quote="CajunCowboy" data-source="post: 3071049" data-attributes="member: 108280"><p>Your current CBTO measure is less than the saami freebore measure for the 6.5cm (2.140") so very good chance the bullet is getting hung up at the chamber mouth or in the freebore region BEFORE the lands (throat region). Two ways I've run into the same issue are (1) dirty/carbon fouling…rifle needed a good cleaning of freebore and throat area..lots of c4 and brushing (2) new rifle that needed to be polished or in my case broken-in (~200 rds) then cleaned thoroughly. Bore scope can help diagnose the first. I had inconsistent measurements in that instance. With the second type, hammers (but not Bergers) were getting a consistent short reading on a new barrel. The first 200 rds broke the barrel in..likely deburring or polishing a spot where they were hanging up. Hope this helps</p></blockquote><p></p>
[QUOTE="CajunCowboy, post: 3071049, member: 108280"] Your current CBTO measure is less than the saami freebore measure for the 6.5cm (2.140”) so very good chance the bullet is getting hung up at the chamber mouth or in the freebore region BEFORE the lands (throat region). Two ways I’ve run into the same issue are (1) dirty/carbon fouling…rifle needed a good cleaning of freebore and throat area..lots of c4 and brushing (2) new rifle that needed to be polished or in my case broken-in (~200 rds) then cleaned thoroughly. Bore scope can help diagnose the first. I had inconsistent measurements in that instance. With the second type, hammers (but not Bergers) were getting a consistent short reading on a new barrel. The first 200 rds broke the barrel in..likely deburring or polishing a spot where they were hanging up. Hope this helps [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
COAL using CBTO from Hornady OAL gauge significantly shorter than book COAL?
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