Many tiers are now suggesting that when tying on a conehead you make a wrap or two of lead (or equiv.) wire in back of the cone and then jam it into the cone to keep the cone in place. The problem here is that the spiral wrap is a spiral and its front edge does not press evenly all around the pocket forcing the cone to twist to one side. Any suggestions?
The phrase “jam it into” implies forcible compression of the lead wraps. As lead is malleable, it ought to flow into the opening, and if done with care, could evenly fill the space. As with beads, I just use thread behind the cone. And, the fish don’t care if it is not perfect.
I often use several or more wraps of lead wire behind the cone, and after shoving the wire into the cone I use some super glue on it. I make up a dozen or so of these in advance of tying the rest of the streamer so the glue is completely dry beforehand. Usually, I’ll also give the dried wire and cone a moderate twist to make sure it has set well, and sometimes it takes a second dose of glue to do the job.
I think that the super glue secures the finished fly better, and in the end you won’t have to make nearly as many thread wraps behind the cone and end up with an overall neater looking fly – just my opinion.
John
I use a small bead behind the cone and just let the cone rattle against the bead. No need to secure it solid.
fishbum
I use the cone head plus lead wrap method. I find if I hold the hook head down and rotate the lead wrap at some point the offset of the lead balances the offset of the hook eye and the cone sits level. At this point I give it a good coating of homemade head cement (GOOP + tolulene) and hang by the hook bend on the horizontal arm of my bobbin cradle. I like to prepare a dozen or so in this way prior to tying.
To avoid the high cost of tungsten cones I often use a cheap brass cone head with 10-14 turns of lead wire.
i’m not seeing the conehead movement as a problem. maybe its just me. 
when i tie on a cone head, i dont use wire cause the cones cock sideways on me too… anyhow i build up a base where the cone is gonna set with tying thread untill the cone just barely fits the apply superglue to the thread and slide the cone over that… never had a problen with the cone moving or shifting doing it that way… if you use the thread/superglue method, better get the cone where ya want it before the glue sets up cause once it sets up (dont take long) its there & it aint moving…
Try a bit of UV Knot Sense. Just fill the back, center by hanging from vise facing downward, hit with lamp, and repeat for however many flies you are going to tie.
I tried Bugman’s suggestion of using crazy glue. It works fine.
I also use the UV knot sense with UV lamp. It is fast and makes for a very even, secure and lasting fit. However, each to his or her own.