357 Mag 110gr XTP loading issue


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Old 10-11-2010, 01:39 AM   #1
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Default 357 Mag 110gr XTP loading issue

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?



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Old 10-11-2010, 10:07 AM   #2
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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.



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Old 10-11-2010, 02:05 PM   #3
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Default 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!

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Old 10-11-2010, 02:10 PM   #4
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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.

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Old 10-11-2010, 03:11 PM   #5
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Are you trimming your cases to a uniform length after sizing?

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Old 10-11-2010, 03:28 PM   #6
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Default 357 mag 110gr

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

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Old 10-11-2010, 03:40 PM   #7
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Quote:
Originally Posted by Highpower View Post
Are you trimming your cases to a uniform length after sizing?
I measured all the cases, they were the same.

Quote:
Originally Posted by Kestral View Post
Have you checked that your bullets are all to the correct diameter
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.
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Old 10-11-2010, 03:48 PM   #8
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Default 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.

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Old 10-11-2010, 03:54 PM   #9
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Default 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.

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Old 10-11-2010, 03:56 PM   #10
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I was using a Lee 4 hole turret press so that was the crimp die I was using.



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