An RO suggested that my mag springs were stiff and this was causing my slide to not fully cycle for the 1st few rounds in the magazine.
Your load is too light. Starting load for a 200 grain jacketed bullet is 4.6 grains of WST. I load 4.8 under a 200 grain lead SWC. I would suggest starting around 4.7 or 4.8 and I bet you will be pleasantly surprised.