How far was your shot?
Recently shot my son's "future .410" and it only patterned to 20 yards.
I shot this turkey within feet of where I took last years bird on opening day. Taken from my one man chair blind that I sat up last Wednesday, no calling, no decoys. Just setting up in a spot that turkeys always seem to travel at my dads place.
The shot was about 20 yards maybe a little less. The trick to using the .410 is shot size, as you only have 3/4 ounces of shot in a 3" shell. Many .410 shooters choose #9 shot for turkey. I chose to use #7 1/2 in my gun. The scope is a big help in actually aiming at the head, actually the neck just below the head is my point of aim.