Recent content by Doom

  1. Doom

    Need UPS for FX120i

    Zero drift is a function primarily associated with the temperature of the electronics in the scale/balance. It comes from two sources, the initial powering up of the electronics when the scale is turned on and changes in ambient temperature. It is important to remember that the drift is not...
  2. Doom

    Retesting some reloads today. Very odd results!

    @sig2009, if I interpret you correctly you shot multiple groups of 5 shots and got sd's ranging from 2-6 fps. If this is correct and your ES was essentially 2xSD then you were loading very consistent ammunition. That's true even if the loads were different. On the second loading if the same...
  3. Doom

    Retesting some reloads today. Very odd results!

    Your comments on good/bad have merit. If the rounds are loaded at different times then those factors and others all come into play as they tend to indicate some type of inconsistency in the load process. That may well be powder charge seating depth, brass prep, orientation of the rounds prior...
  4. Doom

    Retesting some reloads today. Very odd results!

    You've been given the explanation that relates to sample size and it is also an issue of not understanding the concepts of sampling and expectations. You are looking at test data that is subject to random selection and errors. You are not considering what the test data means in relation to the...
  5. Doom

    POI Channge @100 Yards With a 'Similar' Load

    The primary change is most probably due to barrel harmonics causing the barrel release point of aim varing between the two but recoil is probably playing a minor roll. As for external ballistics the 100yd variation due to only the velocity/Ballistic coefficient difference is about +0.2" if you...
  6. Doom

    .308 Winchester

    He should take his own advice.
  7. Doom

    8208xbr thoughts

    You ask an interesting question. I can tell you that 8208 works well in 223 and 308. I've used it in both and it is my go to powder in 223 with a 52/53 gr bullet in my 223 varmint rifle. I don't currently use it in 308 with the 168SMK but I have produced good loads with it. Is it better than...
  8. Doom

    Bullet jump on 5.56x45 when slammed into battery

    As far as as the LCD the issue is springback. it occurs in the direction the metal was bent/shaped from. So the case neck sized with the LCD tend to open in diameter with both short and long term setback. With a regular FLS or bushing die the case neck is made smaller than the mandrel or...
  9. Doom

    M118LR Projectiles

    The M118LR has a sordid history with both the SMK and with the Military 173. See the following: https://snipercentral.com/history-m118-ammunition/ In the 08 time frame it could be that it is Mk 316 Nod 0. Check the package. IF it says M118LR "Special Ball " it is the 175SMK with IMR 4064.
  10. Doom

    Bullet jump on 5.56x45 when slammed into battery

    The advice of @45-90 and @RegionRat is spot on. I will add that assuming only 0.002" tension is preferred is probably not the best approach for a semi automatic rifle. As they have noted setback and also having the bullet slip forward and and does occur. A primary safety issue is setback. As...
  11. Doom

    Help with Reloading Data

    It does appear you are significantly over on pressure but the degree to which this is true depends on your barrel length. 2825 fps is about the max you should see in a 26" barrel and around 2775 in a 24" barrel. It unusual to see #41 primers but I assume this may be because of pressure signs in...
  12. Doom

    Seating depth test, grouping interpretation and where do I go from here?

    The best advice I can give has already been given by @JerkyFreak. Being a new shooter its very likely that you are the largest variable in the system. Likely greater than powder charge or seating depth or neck tension. This is especially true for shorter distances like 100 yds. My personal...
  13. Doom

    Fouling past the case neck

    My first thought was low charge but I think that this may be the issue or lack of neck tension.
  14. Doom

    .308 pressure issue

    Understood.
  15. Doom

    .308 pressure issue

    Not going to argue the point but you are wrong. Remington's 308W have a long free bore and it is not per SAAMI. Try and load a 168 SMK 0.010" off the lands in a 700 and only the boat tail would be in the case mouth. No, it is not just my rifle. Those of us who reload for this rifle are...
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