LRR the Ammo is a recent purchase. I contacted PPU and the gentleman there verified it was a recent Lot. Both times I was under cover, no direct sunlight. Ambient temperature was 90 degrees out. I'm just gonna follow the advise I have been given here and send it back to BCA. Everyone here agrees that the changes I have made shouldn't effect the gun so I'm not gonna invest alot of time in it. Gonna purchase anther upper and install a Faxon barrel and bolt and retry with a better product and if they can fix the issue with this one then I will use it as backup.
dsbarrios1 Wrote:LRR the Ammo is a recent purchase. I contacted PPU and the gentleman there verified it was a recent Lot. Both times I was under cover, no direct sunlight. Ambient temperature was 90 degrees out. I'm just gonna follow the advise I have been given here and send it back to BCA. Everyone here agrees that the changes I have made shouldn't effect the gun so I'm not gonna invest alot of time in it. Gonna purchase anther upper and install a Faxon barrel and bolt and retry with a better product and if they can fix the issue with this one then I will use it as backup.
What barrel lengths are you looking at?
NRA Basic, Pistol, Rifle, Shotgun, RSO
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
08-28-2023, 06:56 PM (This post was last modified: 08-28-2023, 07:00 PM by Harpoon1.)
LRRPF52 Wrote:Ive pierced several primers in my .260 Rem gas gun, which has too generous of a firing pin aperture on the bolt.
It showed up doing load development with N540 and maybe another powder pushing 140gr-142gr.
I also tried Quick Load to get some low-end start loads with the cut-down 94gr GMXs and and blew primers, ceased firing after I saw the brass.
A guy sent me an enlarged firing pin to fill the .086 aperture on the DPMS bolt, which helped reduce the incidence of cratering.
Chamber pressure in the .260 Rem is 10,000psi + higher with 10-14gr more slower-burning powder.
Actually, I forgot I did blow a few starting out with a min charge of RL22 in my 6.5x55 SE 1907 M38 Swedish Mauser! Lyman data right out of their latest manual. Had just got the gun and trying to take it easy on it. First 4-5 shots I was piercing every other primer! WTF? So I quit, double checked everything at home, it was all by the book. Dumped another grain of powder in there and never had another problem! I was using a different case and primer than the book called for and that apparently was just enough cause the issue! Since then, Ive never started out with a min charge again!
LRRPF52 Wrote:What barrel lengths are you looking at?
LRR, Im looking at the 16" gunner. I want the shorter barrel which makes it easier when I need to bring it up in the RZR. Anything longer would be a nuisance. I thought about a 12" but dont want to screw with the SBR regulations. The build below is what I'm currently having issues with.
I feel you on the 16 barrel or less. Theyre so much easier to throw into a small carbine case and stow in a vehicle.
16 barrels I have used with great results so far:
AA MLGS Medium Contour I ordered from Midway in 2009
Lilja Wasp profile lightweight Stainless, 3 groove, shoots bug holes
AA fluted light MLGS (built several uppers with these for friends and they all were very pleasant to shoot)
Alexander Arms is using .875 gas block journals if you go that route.
NRA Basic, Pistol, Rifle, Shotgun, RSO
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
Where we at with pistol braces these days? Last I heard atf was eating dog poop in court. Might be an option if sbr is out of the question, or if atf tries this kind of funny business again, a way to sbr without the wait or fees... just plan for it and execute as such to weaponize their policies against them, not as a compromise to cave in.
Zeneffect Wrote:Where we at with pistol braces these days? Last I heard atf was eating dog poop in court. Might be an option if sbr is out of the question, or if atf tries this kind of funny business again, a way to sbr without the wait or fees... just plan for it and execute as such to weaponize their policies against them, not as a compromise to cave in.
Limbo. With some courts saying and doing one thing and others doing other. ATF is effectively not enforcing anything on the topic yet, and no FFL or gun dealer is willing to transfer a firearm with an armbrace on it right now, either. Where will it land? who knows - decent odds ATF will win, IMHO. I'd love to see them not. I wouldn't really bank on being able to purchase or build a new 12" option with an armbrace on it as being 100% kosher long term right now. But I wouldn't really worry a lot if you already have a pre-existing one, as basically what's really happening is they are casually just being grandfathered anyway.... for now. .. mostly.
Harpoon1 Wrote:What is the origin of that PPU ammo? Specifically where and when did you purchase it? PPU recalled a bunch of their Grendel ammo several years ago, and then it was off the market for a while. https://ppu-usa.com/news/
Just putting this out there. A while ago I chronographed some PPU 180gr factory ammo from my 308Win. Average over 5 were 2650fps, all above at least 2590fps (that is 30-06 performance for those that don't readily know the figures, and way too hot for comfort). It was not a particularly hot day. I know this doesn't answer OP's question, as he had that across more brands of ammo. But just saying, PPU can be hot.
That be true! I have an old Mauser K98 that has an almost pristine barrel on it. When I first got it, the only ammo I had for it were my hand loads made from 30-06 brass. I could have bought surplus ammo with corrosive primers but I didn't like that idea so reloading was my only option at that time. One day, in a LGS, I saw some PPU 8mm Mauser ammo on the shelf so I bought a couple of boxes. PPU 8mm Mauser ammo has 196gr bullets. I figured their recoil might be stout but I wasn't prepared for the beating I took shootin' that stuff. I thought I was shootin' a .458 Win Mag! Kicked the crap outta me! :eek:
I refuse to be victimized by notions of virtuous behavior.
