Already there. Polymer cases, steel caseheads.Kinda makes you wonder where all this is headed.
30%-40% lighter than brass cased, a game-changer for mil applications.
Already there. Polymer cases, steel caseheads.Kinda makes you wonder where all this is headed.
But-- are there any bolt action manufactures stepping up and saying their actions are in fact safe to use with the 277 furry 80k cartridge?Modern actions are built/designed to withstand 200,000psi pressures without breakage.
Catastrophic failure at less than 200,000psi occurs from detonation which the action cannot handle due to speed of max pressure rise. Handling NORMAL pressure, not sudden explosive detonation, at or beyond 80,000psi is of no concern. In fact many handloaders are pushing the boundaries of 100,000psi without even knowing it…
Cheers.
Source?Modern actions are built/designed to withstand 200,000psi pressures without breakage.
Catastrophic failure at less than 200,000psi occurs from detonation which the action cannot handle due to speed of max pressure rise. Handling NORMAL pressure, not sudden explosive detonation, at or beyond 80,000psi is of no concern. In fact many handloaders are pushing the boundaries of 100,000psi without even knowing it…
Cheers.
Aren't proof loads 1.5x a normal cartridge?Magnum proof rounds hover in the 85K+ range, and many rifle manufactures torture test their designs with these off the shelf SAAMI loads. A .277 Fury proof load would be in the 106k+ range. With primer pockets typically opening up on brass proof rounds, I kind of doubt hand loaders have been pushing anything to this level and not knowing they're way over pressure.
In my experience I've had far more case head ruptures than actual receiver/action damage with proof loads. Winchester .308 proof loads have been the worst offender for me. The brass just can't handle it. On the other hand, I've fed a rifle 5 full boxes of 300 Win Mag proof loads just to see if I can break it... no dice.
If anyone wants to send me some reamers and proof rounds, I'd be happy to test it out
33-49% for SAAMI, 25% for CIP in Europe (don't quote me on the CIP).Aren't proof loads 1.5x a normal cartridge?
Any rifle manufacturer and steel supplier…Source?
Any rifle manufacturer and steel supplier…