is te fusion the 3.5" magum camber or standard 3"
if its the 3.5" you need to fire atleast 25-30 heavy 3.5" magum loads through it to loosen it up before trying the lighter 30grm loads
i have the beretta 3.5" magum and i have shot about 40 38grm load through it and it still does not recycle every tmie with lighter loads
make sure its cleaned after every shoot and well oiled
Cheers
Chewy