357 Mag 110gr XTP loading issue

Discussion in 'Ammunition & Reloading' started by spittinfire, Oct 10, 2010.

  1. spittinfire

    spittinfire New Member Supporter

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    So I picked up a box of 110gr XTPs in 357 on the cheap a while back and decided to give them a try. I loaded everything up, set my press and after priming and charging 25 rounds started seating bullets. Two bullets with no seen problem. 3 comes along and when I go to crimp it the case bulges in the middle.....weird. Recheck my crimp, it's fine. Measure 3 or 4 of the cases I have left, they are all the same. Two bullets later the same thing happens. After that I quit since I didn't have the time to mess with it left in the day.

    I'm thinking the case is at fault but I'm not sure. They are nickle marked CBC. I'm not familiar with that name but they looked fine, measured OK and this was a load just to play, it was the minimum load. If I liked it, I would get more serious and move to a dedicated case. Any ideas?
     
  2. spittinfire

    spittinfire New Member Supporter

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    I forgot to mention that the bullets that seated and crimped properly were .010-.012" shorter then orginally seated after the crimp. It was like the crimp was pulling the bullet deeper into the cannelure.
     

  3. hnealg

    hnealg New Member

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    Adjustment OK?

    Sounds to me like the die had gone out of adjustment-as if you were trying to crimp for a .38 spl instead of a .357 mag. Basic pushing it down too far, causing the case to bulge. I had the same trouble with a mal-adjusted bullet seating die. (Switching from .38 to .357...duh)

    Double check the depth of the die. Hope that is all that it is!
     
  4. spittinfire

    spittinfire New Member Supporter

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    That's what I thought at first too so I readjusted it and on the third try it did it again.
     
  5. Highpower

    Highpower New Member

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    Are you trimming your cases to a uniform length after sizing?
     
  6. Kestral

    Kestral New Member

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    357 mag 110gr

    Have you checked that your bullets are all to the correct diameter
     
  7. spittinfire

    spittinfire New Member Supporter

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    I measured all the cases, they were the same.

    I haven't done this but with such a short bullet I was flaring the mouth slightly more then I do normally and they were all sliding easily into the case. The problem didn't come up until crimping, I would think a diameter problem would show itself when seating the bullet.
     
  8. Kestral

    Kestral New Member

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    357 mag110gr

    Ive had this happen to me on odd occassions,some of the bullets were slightly oversize,as they fit so tight,its also ( possible ) that the trapped air cannot escape and bulges out.We would have to get one of our really brainy types to figure out whether thats feasable or not.
     
  9. Kestral

    Kestral New Member

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    357 mag 110 gr

    Forgot to mention it with the above reply,I use with very satisfying results the Lee Carbide Factory Crimp Die. It gets rid of the bulges and crimps the bullet as well to the correct overall amount.
     
  10. spittinfire

    spittinfire New Member Supporter

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    I was using a Lee 4 hole turret press so that was the crimp die I was using.
     
  11. robocop10mm

    robocop10mm Lifetime Supporting Member Lifetime Supporter

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    Roll crimps, especially heavy roll crimps are length sensitive. The odd long case will buckle when the die is set for a shorter case. If I need to apply a heavy roll crimp, I try to do one at a time so I can "feel" the case in the die.

    When they buckle, they will end up shorter. You can fix the buckled rounds by running the loaded round into a sizing die w/the de-cap stem removed.
     
  12. spittinfire

    spittinfire New Member Supporter

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    Would you be nervous to shoot a round that is .015" shorter then what the load data calls for? It's a starting load but still, thats a lot of lost space.
    I did notice that at the called for OAL, the top of the case was not into the cannalure at all.
    I'm going to try a few other cases and see what happens. They may end up going into 38 loads but really wanted to play with a light 357 bullet.
     
  13. DMC

    DMC New Member

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    "I was flaring the mouth slightly more then I do normally "

    Maybe try less flair. Could be catching? Or pot a light taper crimp, then the roll crimp. Not that that's necessarily the way to do it, but it would eliminate the excessive flair before the final crimp.

    DC
     
  14. robocop10mm

    robocop10mm Lifetime Supporting Member Lifetime Supporter

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    The degree of flare will vary with case length. The occasional long case will give you extra trouble. It will overly flare and will overly crimp. This can lead to very bad results.
     
  15. spittinfire

    spittinfire New Member Supporter

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    I was always told straight wall cases won't stretch and these all measured the same.
     
  16. Shade

    Shade New Member

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    BZZZZZZZZZZZZ goes the BS meter....

    Straight walls grow but not as fast or as much as bottle necked cases.

    I do not have time to discuss the details right now, will later.

    But you solution is the Lee Factory crimp die. I will explain later also.

    The short answers is slight variation if case length, unless you trimmed
    them all they will vary by a few thou. Taper crimps are very sensitive to
    case length. The Lee Factory crimp die is not.
     
  17. spittinfire

    spittinfire New Member Supporter

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    I was using a Lee crimp die.
     
  18. Shade

    Shade New Member

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    Hmmmmf, gonna have to think on this one some more...

    I am on the road this week so lotsa dead time in hotels.
     
  19. Kestral

    Kestral New Member

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    Case bulging

    Just started on a mixed bag of 38 s/w reloads,the cases are Norma.Kynock, Dominion & Gevolet. They all reloaded very well except for the Gevolet,they all had very pronounced bulges about a third of the way down,using exactly the same bullets and powder,and also sized to the exact same dimensions.Your original problem with your bulged cases,could have been caused by a batch of thinner walled cases, which I am blaming for my results.
     
  20. Innovative

    Innovative New Member

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    Crimping Solutions ...

    The Lee Factory crimp die is the best crimping die available for SOME "thin necked" rifle cases that require a crimp (not many). The 30-30 is a good example.

    However, I prefer to use an ordinary roll crimp die on the .357 Mag. Just be sure to not over-do the crimp. I suspect that's your problem, and it's a common handloading problem with .38 Spec. or .357 Mag. loads.