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H335 Powder and .223

Discussion in 'Handloading and Reloading' started by 5thSFGroup, Aug 30, 2010.

  1. 5thSFGroup

    5thSFGroup Well-Known Member

    I have loaded some 60 grain and 75 grain bullets using H335 powder. On the 60 grain bullets, the load called for is approximately 23. When using those rounds they appear way too hot. I have lowered them down to 21.5 grains and they seem to be much more civilized. In fact the bottom end of the load was listed at 23.4 I think and went even higher. Nutz on that...way too hot.

    I lowered the 75 grain rounds to 19.5. Does anyone have any comments, observations or wise cracks that they would care to share?

    They are being used in an AR and the barrel is a 1 in 7. Thanks
  2. rcmodel

    rcmodel Member in memoriam

    Something is amiss somewhere.

    Both your loads are well below recommended starting loads in both Hodgdons and Lyman #49 manuals.

    How exactly are you measuring pressure or velocity to even have a clue how hot the recommended loads are??

  3. NCsmitty

    NCsmitty Well-Known Member

    Have you shot factory or milsurp ammo? If so, what did they act like?

    As rcmodel mentioned, something doesn't sound right. Double check your scale zero, and verify the charge weights.

  4. snuffy

    snuffy Well-Known Member

    Approximately???¿¿ There's no approximate loads in any loading manual. There's a bunch of SPECIFICloads. Nothing involved with reloading is approximate.

    I routinely load 24.0 H-335 with 60 grain V-max Hornady's. Noting hot about it, of course those were worked up from beginning loads.
  5. 5thSFGroup

    5thSFGroup Well-Known Member

    I checked this more than ten times. I am using an RCBS scale and a RCBS powder ispenser that has worked fine for all of my other loads. I use this scale on verifying all of my hand gun loads and they are fine.
  6. Canuck-IL

    Canuck-IL Well-Known Member

    Well, then, it comes down to your definition of "way too hot." What's the evidence? Primers flattening, velocity over a chrono, what?

    The load range you're referencing is pretty routine.
  7. 5thSFGroup

    5thSFGroup Well-Known Member

    Two primers blew. That is what started the concern. By the way, in the scientific community, all and I do mean all measurements are considered approximate. When I take a measurement, I use specific indicators and presume then to be accurate. I do not fudge on the readings....the term approximate is in compliance with scientific standards.
    Last edited: Aug 30, 2010
  8. Canuck-IL

    Canuck-IL Well-Known Member

    Well, as RC noted, something is amiss. Were they reloads? Federal brass for instance has a known record of soft pockets that begin to loose their primers upon reloading relatively earlier than other brands.

    Without a tolerance provided that's just so much verbiage. Most reloaders load to +/- .1 grains altho some measure/powder combinations require a lot of checking to maintain that.
  9. Rokman

    Rokman Well-Known Member

    I have loaded up to 25.0 grains H335 with Nosler 60gr. btips with Win and Rem brass and CCI 400 primers in my AR's with excellent results.
  10. evan price

    evan price Well-Known Member

    First, what brass? Some brass is thicker or contains less volume and needs less powder. Second, how deep are you seating? Third- is your firing pin just too pointy?
    That charge should be OK.
  11. Rokman

    Rokman Well-Known Member

    I think you would be better served using RL15, TAC, or Varget with the 75 grain bullets. I know that they have worked well for me. Good luck.
  12. Ol` Joe

    Ol` Joe Well-Known Member

    You`re not loading Rem 6 1/2 primers are you?
  13. ArchAngelCD

    ArchAngelCD Well-Known Member

    I agree. something isn't right here. There are so many causes to primer problems it's hard to pinpoint on the Internet. I use H335 for most of my .223 ammo and never have a problem with blown primers. I have use CCI-450 primers (SRM) and CCI #41 NATO primers but mostly standard CCI-400 primers without incidence.
  14. snuffy

    snuffy Well-Known Member

    You speak/write in generalities. Two primers blew." How? Did they pierce? Or fall out of over-expanded pockets? What brand and number primer? What make of brass?

    You come here looking for advice, but give almost no specific data.

    As for the scientific community accepting approximate measurements, how did we get to the moon and back without being damn sure of their measurements? Any powder measure is set by the factory to be pretty darn precise. It's up to the user to make sure it's set up correctly. Then the best bet is to get some check weights to verify that it's zeroed. Then when we're discussing powder charges, we write 23.0 grains, not just 23! 23 what? Clams?
  15. 5thSFGroup

    5thSFGroup Well-Known Member

    I am using military brass (un used) and CCI military primers. The two primers that blew actually locked up the bolt. One of the brass rounds shattered at the base. I took the remaining rounds apart and measured the powder in them to be sure that they were not overloaded. They were loaded at the same time as the problem rounds and were in compliance.

    Evan, I think you might be correct. The military brass is thicker. I believe that might be a good call.
  16. 5thSFGroup

    5thSFGroup Well-Known Member

    Also, the the scientific community does not "accept" approximate measurements, it uses the term "approximate" because there are no absolutes in science except Kelvin, which is absolute zero degrees.
  17. Historian

    Historian Well-Known Member

    I have been loading 60g Noslers over 23g of H335 for several months now for my Varminter and getting very good results. I have never had the feeling that the load is too hot and my cases don't show any signs of overpresssure. BTW I am using Lake City brass and CCI small rifle primers.

    "A general dissolution of principles and manners will more surely undo the liberties of America than the whole force of a common enemy."
    Samuel Adams
  18. rcmodel

    rcmodel Member in memoriam

    Military brass is simply not going to make below Starting loads blow primers.

    You have something else going on you haven't discovered yet.

    Keep looking, starting with the scales being off, (check weight test it)

    Or powder bridging in your measure drop tube & dropping a light charge followed by a heavy charge occasionally. (inspect all the charges in a loading block before seating bullets in all of them.)

  19. Canuck-IL

    Canuck-IL Well-Known Member

    ...or it's not really H335. It happens!
  20. 5thSFGroup

    5thSFGroup Well-Known Member

    Thanks Canuck. I have just gone back through a batch and inspected the powder level in each case prior to pressing the round into place. I will give it a try and see what happens. The powder is being dropped by an RCBS unit and my scale is a RCBS. I have checked it at zero. I have had no problems with my pistol rounds (I am using Clay powder in them). My .40 and .45 rounds function perfectly. I have another container of H335 and may open it to see if there is a difference.

    Thanks again to all for the suggestions. It is appreciated.

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