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Anyone here have issues with the 120gr wolf gold MPT ammo, the manufacturer of my barrel was test firing it with that ammo and having pressure signs, but not with hornady ammo?
the chamber is a .264LBC btw.
Can you eject a loaded round easily? When I first started loading for the Grendel, I was loading COAL to what the data said. Some of the rounds were long enough that they were jamming into the lands on my CSS barrel. Depending on how the chamber is cut, you may need to seat the bullets deeper even though it is a factory round.
Anyone here have issues with the 120gr wolf gold MPT ammo, the manufacturer of my barrel was test firing it with that ammo and having pressure signs, but not with hornady ammo?
the chamber is a .264LBC btw.
To see pressure signs with the Wolf and not the Hornady leads me to look at the main differences between those two types of brass: primer size... (large rifle primer for Wolf=less brass mass to resist molten state from heat)
However, the Wolf are normally loaded to moderate pressures and should not produce pressure signs, so I'm also thinking about the Wolf MPT jacket thickness and your chamber dimensions.
Explanation: If the Wolf MPT jackets are thin, and/or the chamber dimensions are abrupt from the leade into the rifling, there could be residual jacket ring buildup, as happened with the differences in 6.8 SPC chambers with a mistaken 80 degree angle on some barrels that caused major Kaboom with large-rifle primed ammunition. You'll need to have someone that is competent bore-scope your throat and leade to rule that out.
Are there any pressure signs after shooting Wolf, then with Hornady without cleaning? Are there any escharred (black soot) marks around the primers?
Also, what is your barrel length and gas system length? Buffer type, weight, and recoil spring type? Bolt carrier weight?
Ill try to get the specific weights and let you know, it is a 20" bbl with a standard rifle lenght gas system, a2 stocl, buffer, and spring, I. Won't know the ansers to the rest until I get it back from the manufacturer.
To see pressure signs with the Wolf and not the Hornady leads me to look at the main differences between those two types of brass: primer size... (large rifle primer for Wolf=less brass mass to resist molten state from heat)
Given many are reloading Wolf and IMI 7.62x39 brass with large primers without issues makes me pretty sure that's not the issue. :-) Maybe looser primer pockets after 5-10 reloads, but that's not the issue here.
Given it's another non-standard throat/chamber my #1 suspect would be COAL, with the different bullet type jamming the bullet into the lands. Do you see rifling signs on an ejected unfired round?
Given many are reloading Wolf and IMI 7.62x39 brass with large primers without issues makes me pretty sure that's not the issue. :-) Maybe looser primer pockets after 5-10 reloads, but that's not the issue here.
Given it's another non-standard throat/chamber my #1 suspect would be COAL, with the different bullet type jamming the bullet into the lands. Do you see rifling signs on an ejected unfired round?
I agree. There should not be any pressure signs with Wolf, but it is interesting that there were none with the Hornady. Something else is going on enough to manifest the pressure with the Wolf brass, which points to chamber dimensions in the throat/leade area.
We know that the main difference in .264 LBC and a Grendel chamber is the compound throat...where .264 LBC doesn't have it, and the Grendel does. Wasn't the .264 LBC geared more for the Hornady 123 Amax or something like that? I remember this discussion from the forum before it was trashed, so I can't look it up.
I,too, have wondered about pressure issues with the Wolf Ammo as I was experiencing about 10% of the cases would blow the primers out of the back of the case when fired. After looking over about a 100+ wolf cases after I shot them, the remaining cases don't look like there are pressure signs on the primers.
In following up with it, I spoke to Bill Alexander for about an hour last week. He explained that my Wolf ammo was probably an older lot, and that there were problems with proper case hardness in early wolf ammo. I also mentioned that I had heavy ejector marking on my wolf cases, too. Again,Bill wasn't too worried and told me to try some other ammo to see if I had any other issues. He was pretty confident that I wouldn't have any issues with the newer wolf ammo or the hornady Amax ammo. So, I ordered some factory loaded hornady 123 Amax to try out.
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