Primer protrusion into firing pin hole.
Hammer nose fit in hole......
Accurate No. 9 is position sensitive in 357 mag.
357mag No. 9 Powder. Position sensitive powder.
Primer protrusion into firing pin hole.
Primer metal extruded into firing pin hole.
10 rounds fired with 11.5 grs NO. 9 powder.
Rim formed on primer. 12.4 grs No. 9 powder. Hand weighed.
243winxb

Primer protrusion into firing pin hole.

ACTION LOCKED UP.
Primer Metal filled the gap Fired on May 10, 2022. Firing pin protrusion .053"
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S&W M28-2 357 mag.- Defective Winchester Primers.
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