Trojan Doubles

[Harry Collins]

I recently purchased a 16 gauge Trojan that shows little use. Im shooting Winchester Super X Game Loads 1oz #8 shot @ 1165 fps. The only two times I've shot it was at sporting clays. Both times it doubled three times out of four boxes of shells. After the first 100 shots I took the gun apart to see if there was any goop under the left sear. None, but I scrubbed the sears and hammer with Krol Now that I have the hulls I'm going to load 7/8oz @ 1100 fps. To see how the old girl responds. Still there is something wrong. I shoot left handed and none of my other Parkers double so I doubt I am inadvertently pulling the rear trigger the same time I'm pulling the front trigger. Any suggestions?