Recent content by Doom

  1. 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...
  2. 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.
  3. 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...
  4. 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...
  5. 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...
  6. 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.
  7. Doom

    .308 pressure issue

    Understood.
  8. 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...
  9. Doom

    SEMIAUTOS - SHOULDERS GETTING BUMPED UPON CHAMBERING

    The first requirement to have a reliable firearm is that the ammunition chamber correctly. If is doesn't you are screwed. If I took your example of setting the datum what could happen if I rode the charging handle a little bit when loading the first round from an uncharged bolt? What could...
  10. Doom

    .308 pressure issue

    Looking back through this thread I found this and it brings up an important point. Remington 700 308W chambers are nowhere near the same as any chamber cut with a SAAMI spec reamer. There is so much free bore that a 168SMk seated to the lands may not have any bearing surface in the case mouth...
  11. Doom

    SEMIAUTOS - SHOULDERS GETTING BUMPED UPON CHAMBERING

    Unlike a bolt action rifle the Autoloading process imparts a great deal of kinetic energy into the cartridge itself and as the cartridge enters the chamber the only thing that stops it is the shoulder itself. The energy is dissipated by deforming/reforming the shoulder slightly on each...
  12. Doom

    .308 pressure issue

    Federal and Lapua brass are in the same ball park as far as case capacity goes. Winchester typically has about 2 gn of water greater capacity. While you do seem to be on the low end of max the heavy bolt lift is a sure sign of pressure. If you are loading near the lands then that may be why...
  13. Doom

    30-06 COAL and CBTO with 178 ELDX

    Was just referring to the freebore comment.
  14. Doom

    30-06 COAL and CBTO with 178 ELDX

    Remington 308W chambers have a LOT of freebore. It borders on ridiculous in fact. If I were to load a 168 SMK to touching the lands the only part of the bullet in the case would be the boat tail. 175 SMK isn't much better. As to whether these newer bullets would seat at these jumps I have no...
  15. Doom

    30-06 COAL and CBTO with 178 ELDX

    If this 30-06 chamber is anything like the 308Win then "… seating die set for a .020 jump" is a bad idea. Note the comment on freebore by @spife7980. Looking at the pictures it looks like the bullet is only about halfway into the neck. I am sure Hornady didn't have the 30-06 in mind when...
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