Is This Excessive Pressure??

Discussion in 'Reloading' started by Ingwe, Oct 5, 2018.

  1. Ingwe

    Ingwe Well-Known Member

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    I would appreciate hearing your comments on these pic's.

    Fired from a 7mm Rem Mag loaded with 78.0gr of RL33 pushing a 175gr Nosler Accubond LR at 2,922fps.

    I am seeing some cratering on the primer but it doesn't look flattened-out and hasn't spread out. I don't see any marks on the case either.

    What do you guys think...does it look safe or excessive?

    The second pic (lighter-shiny brass) is loaded with 79.0gr of RL33. The cratering is a bit more pronounced but not by much.

    The extra grain of powder is only giving me an extra 13fps so I would go with the 78.0gr if you guys think it's OK.

    Whatdaya Think?;)
     

    Attached Files:

  2. okie man

    okie man Well-Known Member

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    First pic, edges of primer are still rounded, no imprinting of bolt face machining, maybe just a over sized firing pin hole. Second one looks like your pushing things a bit! What's a factory load look like?
     
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  3. Ingwe

    Ingwe Well-Known Member

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    Can you believe that I never shot a factory load from this gun;)
     
  4. okie man

    okie man Well-Known Member

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    Did you work up too those 2 loads?
     
  5. phorwath

    phorwath Well-Known Member

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    You're probably fine, simply based on the appearance of those primers. MV seems in the ballpark also, correct?

    The Hornady brass is a handicap, IMO. But I've had it with Hornady brass, so I'd buy brass from another manufacturer.
     
  6. Ingwe

    Ingwe Well-Known Member

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    I did okie. I looked at the brass again and at 77.5 there is no hint of a crater, and as you see at 78.0 there is a bit of a crater

    I’m getting 2,890 at 77.5
     
  7. Ingwe

    Ingwe Well-Known Member

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    My thoughts too was that I am ok but I wanted to check with you guys here first

    Yes about Hornady! I have a bunch of Norma that I will use once I’m ready
     
  8. acloco

    acloco Well-Known Member

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    When you change brass manufacturers, need to work the load up again. Internal brass dimensions and neck tension will vary, therefore, so does pressure.

    Can also occur with different manufacturing dates of the same manufacturer brass.
     
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  9. 1Moose

    1Moose Well-Known Member

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    That second pic is so much lighter — especially the primer which looks silver vs gold— it almost makes it appear as it’s a different brand. Stupid ? I’m sure, but is it in fact the same primer in both cartridges?
     
  10. Ingwe

    Ingwe Well-Known Member

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    Yes, same case and primer too.....just different lighting
     
  11. 1Moose

    1Moose Well-Known Member

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    It looks to me like you’ve found that point of diminishing returns on velocity and pressure increase with that last grain
     
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  12. Heavyiron

    Heavyiron Well-Known Member LRH Team Member

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    The first one looks good. Will 33 react to temp extremes negatively?
     
  13. Ingwe

    Ingwe Well-Known Member

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    I hope not;)
     
  14. Ingwe

    Ingwe Well-Known Member

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    I’m thinking the same..just wondering if I’m ok at 78.0