Primer bulged

[harricook]

Heres 2 primers -
http://www.davederrick.aquiss.com/images/Primers.jpg
I thought the one on the left was OK, but now its magnified it does look like cratering around the firing pin. The one on the right is one of the ones I thought looked blown out. Think I'll step the load down a bit.

But did you notice the bulging before you decapped them ?

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[davederrick]

But did you notice the bulging before you decapped them ?

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No, but I wasn't looking - only after I decapped them. After I spotted it, I did look at the remaining rounds before decapping & didn't see any more that looked wrong.

Something simple like a slightly oversize bullet or a tight crimp can cause the pressures to go up. Mixing cases can have the same effect because the internal volumes vary due to the thickness of the brass.

All the same cases, perhaps I'll go for a lighter crimp as well as stepping the load down.

Cheers guys.

[harricook]

I personally think that decapping caused the bulge

Carry on loading as you are now & check the next batch of empty cases prior to decapping (or when you are shooting) ..

I shoot 357 Mag using Accurate No 5 in a Marlin at max load & I do not get any sign of bulging

BUT - I can show you loads of primers that look like yours after decapping !


Cheers

Roy
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[davederrick]

Thanks Roy.

[loiner1965]

looks this way....would be better if you took a pic whilst still in the case.....looks like it was abit tight in the hole and required a bit more ooommmmph to decap
Cheers