Me-Timing issue(skip'n)along with bolt & trigger return spring and FP.
Had to send it back for the 'over-rotation' & FP upgrade with the screw in bushing.
FA did the repair and upgrade for free as I'm the original owner. But UPS ship'n was a killer in fees. FA did pay the return postage
Yeah-I shoot my .454 a lot.
Have to say, I was surprised that the well made wire springs broke.
LG