Krogen
Member
- Joined
- Dec 29, 2010
- Messages
- 318
'zactly!
The case head is solid there. Sizing dies don't reach that area, so he's probably not "smushing" the case.
Ken Waters used to (try) to judge rifle pressures by measuring case head expansion with a micrometer. In the following years, that method hasn't been well-accepted. Even so, Ken was looking for expansions of around 0.001" at rifle pressures. If DaisyCutter is truly seeing fingernail-detectable expansions in that area of a handgun case, something's definitely amiss; especially when it's not accompanied by sticky extraction or other issues.
Never heard of this one before. DaisyCutter: Can you get some clear close-up photos of this area - before and after? It would be especially helpful to see the same particular case when new, just-fired and then re-sized.
The case head is solid there. Sizing dies don't reach that area, so he's probably not "smushing" the case.
Ken Waters used to (try) to judge rifle pressures by measuring case head expansion with a micrometer. In the following years, that method hasn't been well-accepted. Even so, Ken was looking for expansions of around 0.001" at rifle pressures. If DaisyCutter is truly seeing fingernail-detectable expansions in that area of a handgun case, something's definitely amiss; especially when it's not accompanied by sticky extraction or other issues.
Never heard of this one before. DaisyCutter: Can you get some clear close-up photos of this area - before and after? It would be especially helpful to see the same particular case when new, just-fired and then re-sized.