357 Magnum pierced primers

[clearwater]

In an effort to push some hard cast at a bit higher pressure to see if they can stay on paper when 38 special won't, I loaded some 357 magnum
and had primers piercing even at lower loads. It is on the shotgun frame and reamed to Maxi. I went to small rifle primers with the Maxi.

Do I use small rifle with the Magnum too? Doesn't sound right since the factory loads would have small pistol.

[reloaderman]

rifle primers for rifles and pistol primers for pistols.......you can't go wrong .

[clearwater]

Do you have a suggestion for pistol primers that won't be pierced by the shotgun firing pin?

[quickdtoo]

Those with thicker cups, Rem 7½, CCI450, BR4. 

Tim

http://www.accurateshooter.com/technical-articles/primers-and-pressure-analysis/

[clearwater]

Quick-

Those appear to be rifle primers?

[LaOtto222]

You are trying to shoot a 357 Magnum on a shot gun frame that has a large firing pin hole. this produces pierced primers. To see if there is help for this try small rifle primers. They are small rifle primers - they do have thicker cups, so that should help your piercing problem. Also back off your powder a little, the small rifle primers listed are hotter than small pistol primers so you need to back off the powder and work your way back up.

Good Luck and Good Shooting

[quickdtoo]

Quick-

Those appear to be rifle primers?

Yup, you're shootin a rifle barrel on a shotgun frame, not a pistol, use small rifle primers, what LaOtto222 said. 

Tim

[mechanic]

I've found the small rifle primers shoot well in my DW 357 revolver, so I load 'em all small rifle now.  I've also loaded some in 38 and tried them in the wife's Charter Undercover....all go bang.
 
 Ben

[trotterlg]

You should show some pictures, but my guess it that they are being, what they call, "blanked".  It is caused more by the amount of space around the fireing pin than the size of the pin.  The space allows the primer to kind of get cookie cutter out around the fireing pin.  Happens a lot with high pressure small cal loads.  That is why it is so common to have to bush the fireing pins on Remington bolt guns.  Larry