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  1. ReaperDriver

    Online Reloading data?

    Your first link is subscription only. However, $35 a year is not terrible. Your 2nd link appears to be broken.
  2. ReaperDriver

    Inconsistent Pressure signs (Swipe/Ejector marks) on virgin brass with 6.5 "light-ish" loads

    Fingers crossed. Like I said, it was a very small data sample, so I might not be out of the woods yet. But it looks promising. And as @308sako said, the pressures signs were pretty much completely gone and the rounds shot basically into one ragged hole. Also, they were right on the expected...
  3. ReaperDriver

    Ladder test analysis

    Also make sure you have the Lab radar settings correct. If the unit is not set with the default settings correctly, it could give you erroneous readings. Here's my setup to give you an idea of what it should look like. The "rifle" setting is particularly critical to get it to read correctly...
  4. ReaperDriver

    Inconsistent Pressure signs (Swipe/Ejector marks) on virgin brass with 6.5 "light-ish" loads

    Yep. If I take a fired case and chamber it, it bumps maybe a half thousandth. If I size and bump to that .001 to .0015 like above, there is no additional bump from chambering.
  5. ReaperDriver

    Inconsistent Pressure signs (Swipe/Ejector marks) on virgin brass with 6.5 "light-ish" loads

    Ok, to close the loop on this - I'm pretty sure I found my root cause today. I was trying to go through all of the variables that could be causing these obvious pressure signs and torn up brass. It turns out (or at least I'm pretty sure) it has been a headspace issue. I had been bumping the...
  6. ReaperDriver

    Inconsistent Pressure signs (Swipe/Ejector marks) on virgin brass with 6.5 "light-ish" loads

    Hi all, a buddy of mine sent me this link that is super informative about all the stuff we discussed here. It's specifically for AR-15s, but I assume the concepts should be identical to large frame ARs as well. http://www.ar15barrels.com/prod/operation.shtml It's given me a lot to consider...
  7. ReaperDriver

    Inconsistent Pressure signs (Swipe/Ejector marks) on virgin brass with 6.5 "light-ish" loads

    Ah... that makes sense now. Thanks.
  8. ReaperDriver

    Inconsistent Pressure signs (Swipe/Ejector marks) on virgin brass with 6.5 "light-ish" loads

    To your point about less carrier weight - that seem counterintuitive to the problem of the bolt unlocking early. I spoke with the JP guy at length when I bought the parts to build the rifle and he recommended the heavier buffer over their lighter buffer for the exact reason of keeping the bolt...
  9. ReaperDriver

    Inconsistent Pressure signs (Swipe/Ejector marks) on virgin brass with 6.5 "light-ish" loads

    That's a good point, thanks. I will definitely check them if I get around to trying the LC stuff. Worst case, I can just turn the necks down if they end up too thick. I've got tons of .308 brass of all headstamps, so may try a couple. Probably simplest solution is to just get a brass...
  10. ReaperDriver

    Inconsistent Pressure signs (Swipe/Ejector marks) on virgin brass with 6.5 "light-ish" loads

    Ok, maybe we just have different definitions of what a "blown" primer is. I always thought that it was either a pierced primer (hole through the primer strike) or the primer has been physically blown out of the case. Neither of those situations were the case with these particular loads...
  11. ReaperDriver

    Inconsistent Pressure signs (Swipe/Ejector marks) on virgin brass with 6.5 "light-ish" loads

    I didn't know that about IMR 4451. It supposedly is the same or nearly the same on the burn chart right next to H4350 and everyone uses that powder. What would you recommend instead for a faster powder for use in this application?
  12. ReaperDriver

    Inconsistent Pressure signs (Swipe/Ejector marks) on virgin brass with 6.5 "light-ish" loads

    I did this first thing. No issue with the prime brass, bullet slides right in. This is how I discovered I had to neck turn my Lapua brass because a bullet would definitely NOT slide into the fired lapua case. I have done this in the past with the Lapua brass but not the Prime. Turning the...
  13. ReaperDriver

    Inconsistent Pressure signs (Swipe/Ejector marks) on virgin brass with 6.5 "light-ish" loads

    No. No blown primers. I started decapping some to throw in the tumbler before I thought to post. What spurred me to start a thread was how loose the primer felt coming out on the just fired virgin batch. Also, no issue with bullet set back. I've tested that several times.
  14. ReaperDriver

    Inconsistent Pressure signs (Swipe/Ejector marks) on virgin brass with 6.5 "light-ish" loads

    Sorry, hit reply before I was done..... to answer your other questions: The recoil feels pretty mild, but I'm running a TB brake. But it doesn't feel any less or more than the Lapua brass loads. Also my ejection pattern is about 3:30 to 4 o'clock after turning down the gas. It'll be...
  15. ReaperDriver

    Inconsistent Pressure signs (Swipe/Ejector marks) on virgin brass with 6.5 "light-ish" loads

    I'm FL sizing and bumping the shoulder about .0035. Obviously I shot the virgin as is with that big headspace jump. My first gut feel was the big headspace difference from Virgin to Fireformed was the culprit. But then even some of the virgin Prime didn't have a mark on them (No swipe and no...
  16. ReaperDriver

    Inconsistent Pressure signs (Swipe/Ejector marks) on virgin brass with 6.5 "light-ish" loads

    I think the ejector flow marks on the head are what is causing me to pull my hair out. I get them on whatever brass I shoot and whether its a high or low pressure load. I assume that is NOT normal in a gas gun if everything is set up correctly.
  17. ReaperDriver

    Inconsistent Pressure signs (Swipe/Ejector marks) on virgin brass with 6.5 "light-ish" loads

    That's interesting. I do think the chamber neck dimension is very tight, given I have to turn my Lapua brass to not see those same issues. Once I started turning the lapua necks, those same issues went away. However, the PRIME brass is already WAAY under what even the turned lapua necks are -...
  18. ReaperDriver

    Inconsistent Pressure signs (Swipe/Ejector marks) on virgin brass with 6.5 "light-ish" loads

    I have not tried turning the gas off with the Prime brass. Hmmmm, I might try that on my next range trip.
  19. ReaperDriver

    Inconsistent Pressure signs (Swipe/Ejector marks) on virgin brass with 6.5 "light-ish" loads

    I'm pretty sure it's not over-gassed. I'm using a JP XXL (2+) length adjustable gas tube. I've tuned the gas down to just cycle reliably with this load. In addition I am running a JP variable mass (VMOS) weighted BCG as well as a JP weighted silent capture spring (SCS). So there should be...
  20. ReaperDriver

    Inconsistent Pressure signs (Swipe/Ejector marks) on virgin brass with 6.5 "light-ish" loads

    Expansion is addressed above. The bullet is jumping a decent distance. I'm loading them to Mag length of about 2.815. BTO = 2.200. Contact with the lands is about 2.85 something iirc. But the Berger 130 AR Hybrids should be pretty jump resistant. They are definition NOT being jammed if...
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