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Rifles, Reloading, Optics, Equipment
Reloading
Blown primer in .243 Ackley
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<blockquote data-quote="Bob Wright" data-source="post: 1541197" data-attributes="member: 104363"><p>My son-in-law blew 2 primers with factory loads in his .243. Barely got the bolt out. It turns out there was a carbon ring build up right at the end of the neck. I could see a black ring all the way around the spent brass maybe .020" wide at the mouth of the brass. Nowhere else further down the neck! Both cases destroyed at the head.</p><p>He was lazy and would just run patches of Hoppes until they looked clean. No brushing, just stupid and lazy. I'm still ****ed because my head was near that gun, looking for his bullet strikes.</p><p> If the bullets don't slide easily into the spent cartridges on any rifle, you may need to neck turn or look for other quality brass that is .0005-.001 thinner on brass neck wall. I allow .004 clearance with loaded ammo on my 7mm mag. I casted the chamber to have an exact number.</p><p>See if your brass trimmed length is correct. Chamfer i.d. and o.d after trimming or if it's missing completely.</p><p>Check your primer pockets for size often: feel is o.k. when seating primers but subjective. I got a no go pin at max SAMMI dia. (Because of past bolt face witness marks)</p><p>Good luck.</p></blockquote><p></p>
[QUOTE="Bob Wright, post: 1541197, member: 104363"] My son-in-law blew 2 primers with factory loads in his .243. Barely got the bolt out. It turns out there was a carbon ring build up right at the end of the neck. I could see a black ring all the way around the spent brass maybe .020" wide at the mouth of the brass. Nowhere else further down the neck! Both cases destroyed at the head. He was lazy and would just run patches of Hoppes until they looked clean. No brushing, just stupid and lazy. I'm still ****ed because my head was near that gun, looking for his bullet strikes. If the bullets don't slide easily into the spent cartridges on any rifle, you may need to neck turn or look for other quality brass that is .0005-.001 thinner on brass neck wall. I allow .004 clearance with loaded ammo on my 7mm mag. I casted the chamber to have an exact number. See if your brass trimmed length is correct. Chamfer i.d. and o.d after trimming or if it's missing completely. Check your primer pockets for size often: feel is o.k. when seating primers but subjective. I got a no go pin at max SAMMI dia. (Because of past bolt face witness marks) Good luck. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Blown primer in .243 Ackley
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