barnbwt
member
- Joined
- Aug 14, 2011
- Messages
- 7,340
"so I was surprised by how dirty the breech block was when I disassembled the gun"
I've noticed this too, and I assume it's due to blow-by around the case as it retracts, since 9mm is slightly tapered. Either that, or blow by around the primer cup (I've noticed staining around it on some ammo, but not like a cutting-torch jet like you'd see from a primer pierce)
"Brass ejects very consistently around two feet out at about ninety degrees or slightly less."
Yeah, I'm convinced at least some of the guns' issues stem from them simply not cycling very hard due to the damping effect of the Pedersen action; a double edged sword. For a gun with a fixed blade type ejector, the R51 has VERY lazy ejection force. Almost makes me wonder if it'd be better suited with a plunger type that starts pushing the case out of the action sooner in the cycle, because the slide clearly isn't moving fast enough at the end of its travel to really punt the case like most other auto pistols. Makes recoil more mild, especially with the low bore, but isn't the best for reliability.
TCB
I've noticed this too, and I assume it's due to blow-by around the case as it retracts, since 9mm is slightly tapered. Either that, or blow by around the primer cup (I've noticed staining around it on some ammo, but not like a cutting-torch jet like you'd see from a primer pierce)
"Brass ejects very consistently around two feet out at about ninety degrees or slightly less."
Yeah, I'm convinced at least some of the guns' issues stem from them simply not cycling very hard due to the damping effect of the Pedersen action; a double edged sword. For a gun with a fixed blade type ejector, the R51 has VERY lazy ejection force. Almost makes me wonder if it'd be better suited with a plunger type that starts pushing the case out of the action sooner in the cycle, because the slide clearly isn't moving fast enough at the end of its travel to really punt the case like most other auto pistols. Makes recoil more mild, especially with the low bore, but isn't the best for reliability.
TCB