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+--- Thread: Case head ring poll (/showthread.php?tid=600)
Case head ring poll - Lemonaid - 04-01-2022
Taking a poll to see how wide spread the 6 arc "magnum" ring near the case head is. Vote yes if you have had it happen on your brass, no if not.
RE: Case head ring poll - r.tenorio671 - 04-01-2022
..no, using converted Starline 6.5G
RE: Case head ring poll - popgun - 04-01-2022
Yes with Lapua brass, no with Hornady.
RE: Case head ring poll - grayfox - 04-01-2022
No. Not on 6.5 Grendel either.
RE: Case head ring poll - Dino11 - 04-01-2022
Non of my brass has any swelling at the case head, and I have some that getting retired soon. Some of it has been loaded 14 times. All but a 100 rounds is Hornady. The others are Starline.
I keep a close eye on my brass, and segregate bolt and gas gun.
RE: Case head ring poll - StoneHendge - 04-02-2022
Yes with Hornady 6.5G in 6.5G. ( Satern Liberty chamber only, not in JP chamber)
Yes with Hornady 6.5G converted to 243 LBC, but it was hot loads pre ARC data.
No with Lapua 6.5G in 6.5G(JP chamber only)
No with Starline 6.5 G converted to 6 ARC
No with Starline 7.62x39 converted to 243 LBC
RE: Case head ring poll - notagrendel - 05-07-2022
I have had this issue with max+ loadings while using Starline 6.5 and Winchester x39. I use a JP bolt with a Proof Research SS barrel. It freaking kills me that base belting is the first sign of pressure. Not primers, nor ejector or extractor.
RE: Case head ring poll - CZ527 Guy - 05-07-2022
No issues with Hornady 6mm ARC brass or Lapua 6.5 G & 220 Russian converted brass. Though these are fired only in Bolt action rifles. Same experience with 6.5 grendel in the CZ 527 bolt action.
If I understand correctly, The individuals that do encounter this issue in there AR rifles Initially shut off the gas at the gas block to eliminate the semi auto operation for test purposes. My understanding is shutting off the semi auto, eliminates the case head ring. Then they go on to find the root cause of a timing issue.
RE: Case head ring poll - trianglevelvet - 05-12-2022
ARC presents an intresting handloaders possibility.
Since there is data for both gas gun and bolt gun, it shows that the case SHOULD be able to withstand 62k psi.
Its just a question of how strong your bolt is.
Im guessing any load that is making rings on the case is WAY overpressure.