Fiocchi ammo can be hotter than American made ammo because they are loaded to CIP pressure limits, not SAAMI limits. the current SAAMI limits for the .357 Magnum are 35,000 PSI, the CIP pressure limits are 44,000 PSI. That might account for that ammo being HOTTER than most ammo you have shot.

Just a side note, when buying European made .38 Special ammo you might want to be careful because while SAAMI limits are 17,000 PSI the CIP limits are 22,000 PSI, well above the 20,000 PSI SAAMI .38 Special +P limits.

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