Lyman GPR Trigger Screw Question

[Striker]

Does anyone know what the size of the fine adjustment screw is on a Lyman Great Plains Rifle?  I am looking to get a longer adjustment screw than came from the factory.  This is the screw that is visible when the rifle is assembled.  It is located between the triggers.  I apologize if this question is redundant, but I couldn't find an answer by searching.  thanks

[Ray Settanta]

Try this thread:

http://americanlongrifles.org/forum/index.php?topic=25245.msg241577#msg241577

[Turtle]

They and other manufactures shortened these screws for liability reasons so the triggers couldn't be set too light. I have changed a lot, but can't remember where I got them. I will try to remember.
                                                                                Turtle

[Striker]

Thanks for the replies.  The link was helpful.

[jerrywh]

 I changed mine and an other one. I think they are metric and there is no American screws that will fit. I re threaded mine to an American thread and made one to fit.

[Bob Roller]

I changed mine and an other one. I think they are metric and there is no American screws that will fit. I re threaded mine to an American thread and made one to fit.

On the few set triggers I have made lately I went to the 2mmx.4. If it goes sour then and American 2x64 tap can
be used to rethread the hole if need be.No reason for the change,only whimsy I suppose.
Jerrywh is right,retap to the closest U.S.size and fix the problem.
Bob Roller