05-09-2021, 03:15 PM
I agree that this is an under-explored problem. Or maybe it's well-documented in the AR competition world?
I've seen 6.5 Grendel Wolf 123gr soft-point hunting rounds beat all to hell upon chambering. I'd think it would have some effect upon accuracy. (In the case of Wolf, the accuracy issues caused by smashed and bent and nicked tips was probably lost in the noise of the overall inaccuracy of the round.)
I've also seen plenty of scratches on HPBT bullets, but it's difficult to say whether they were scratched upon chambering or upon extracting an unfired round. Never did try it with the ejector uninstalled to eliminate the forces imparted by that variable.
Have also seen one of Hornady's new formula red plastic tips (more brittle?) in 6mmARC actually break off upon chambering and extracting an unfired round, so there's some force being applied there, as well.
Anyway, it's a problem worth solving, if solvable. My guess is we start by looking at how the magazine feed lips control the entry of the cartridge into the chamber, and then look at the geometry and finish of the barrel extension lugs.
I've seen 6.5 Grendel Wolf 123gr soft-point hunting rounds beat all to hell upon chambering. I'd think it would have some effect upon accuracy. (In the case of Wolf, the accuracy issues caused by smashed and bent and nicked tips was probably lost in the noise of the overall inaccuracy of the round.)
I've also seen plenty of scratches on HPBT bullets, but it's difficult to say whether they were scratched upon chambering or upon extracting an unfired round. Never did try it with the ejector uninstalled to eliminate the forces imparted by that variable.
Have also seen one of Hornady's new formula red plastic tips (more brittle?) in 6mmARC actually break off upon chambering and extracting an unfired round, so there's some force being applied there, as well.
Anyway, it's a problem worth solving, if solvable. My guess is we start by looking at how the magazine feed lips control the entry of the cartridge into the chamber, and then look at the geometry and finish of the barrel extension lugs.
:: 6mmARC Target Cartridge with Hunting Capability :: 6.5 GRENDEL Hunting Cartridge with Target Capability ::
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