6,5mm Japanese Arisaka Ammuntion Dimensional Revelations (Photo Heavy)

[Patrick Chadwick]

-ring trick works, but isn't nearly as effective on the semi-rim as with rimmed cartridges.

I just tried loading a cartridge with an O-ring, without actually firing it. The extractor cut clean through the O-ring. So this method would be heavy on O-ring consumption in my rifle. Did you remove the extractor for your experiments? Obviously I could do that, but it would mean using a brass rod to push out each fired case. Any suggestions?

Patrick

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[jmoore]

I just tried loading a cartridge with an O-ring, without actually firing it. The extractor cut clean through the O-ring. So this method would be heavy on O-ring consumption in my rifle. Did you remove the extractor for your experiments? Obviously I could do that, but it would mean using a brass rod to push out each fired case. Any suggestions? Patrick

No mods to the extractor in either rifle, but I did end up just dropping them in the chamber and let the extractor hop over the puny rim. Not a practice that I would do with any Mauser 98 derivative, but didn't take hardly any extra force here.

As the primer protrusion was noticably reduced from previous sessions, it works at least somewhat.

I reckon the rings DO loose some effectiveness due to the barrel face cuts, but I ran them on the "fat" side. (Nice photo of the breech opening, Parashooter!)

Stupidly enough, I think running the charge weights higher would help form the cases properly. Primer set-back always seems the worst when loads run light. I first noticed that phenomenon when loading for an M1917 back in the early '80s. (.30-'06, obviously)

Too many dramas recently to do more in this area. Maybe soon.