- Joined
- Jun 9, 2016
while it's true that a cartridge with a lower than expected powder charge can FTE, usually it's the firearm that has an issue. since in your example, the issue follows the ammunition (presumably you've tested other ammunition in the same pistol and it worked fine) it could just be a quality issue for that specific batch - a handful of rounds or even an entire case out of however many millions of rounds of target ammo produced during a production run is a pretty low percent chance, but still very much possible.I would guess skimping on the powder or maybe inconsistent loading? but I'm sure someone else here knows better and can illuminate us if we are incorrect. I noticed different stampings on the bottom of the cases of some rounds which I thought was a little odd.
you can always weigh cartridge, or if you have a bullet puller, weigh the powder charge and see if there's inconsistencies. 4.2-4.7gr of powder would get just over 1000 f/s for a 115gr bullet out of a typical 5" barrel. it strongly depends on the powder used (Alliant, Unique, Bullseye, IMR, et c).
if over the course of a couple hundred rounds you have greater than average malfunctions that seems to follow the ammunition between weapons (different magazines, different days, different action types, et c) then get in touch with Winchester (https://winchester.com/Support/Customers/Contact-Us) and express your concerns and findings.
in the short term, enjoy some free failure drills i guess.
my experience was that an IR illuminator should be mounted as far forward as reasonable on your weak side, IR aiming module either same and adjusted for offset or top rail and forward to accommodate larger PVS devices. if you needed a laser (on a SASS for example) and weren't going to mount a PVS-4 or something, then the laser on top and closer towards the receiver is optimal to better conform to barrel movement now that free float RAS are more popular and distant shots are affected by the different movements of the barrel and free float RAS shot to shot and in different positions. because a free float RAS and barrel share a pivot point (a position close to the receiver's barrel extension or at the barrel nut itself), but aren't attached to each other much anymore, they move and deflect at different rates. the older RAS had supported the barrel at the barrel nut and at the FSB and, while this could translate bipod deflection to the barrel, a mounted LAM towards the front was deflected very consistently with the barrel.Question about IR laser placement and bendyboi handguards. You see a lot of SOF running their lasers as far back on the handguard as possible to minimize POI shift from the rail flex when load is applied to the rail (bipods, barricaded shooting). The downside is increased splash back from the rail and potentially your thumb. But if one is only planning to shoot offhand, how big of a deal is flex? How much force can be induced with a normal shooting grip? Or is SIG such shit it can't even handle that?
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