There is something wrong with your installation provided that the trigger has not been modified and the internal springs are in the trigger are stock.. There is no difference in a magnum gun and the trigger pull should be about 1 lb 10 ounces. The second stage adjustment does not and should not need to be screwed in very far at all. It is important that you have read the installation instructions closely.
Be sure that you have removed the old original adjustment screw that sets behind the trigger. Also, be sure that the lever is seated properly in the GRT trigger slot.
If that is correct, remove the trigger and set it up from scratch.
Adjusting the second stage:
Using your adjusting tool, adjust the second stage screw to a point where you have between 4 and 5 threads showing in the lever slot and that will put you real close, then reinstall the blade. You should now be within ½ turn or less one way or the other of the adjustment span. When you are moving “pulling†the trigger and you will feel a very slight change in resistance. It’s at this point where you are at the 2nd stage adjustment span. Set the adjustment to about the center of the 2nd stage. Remember, once you are within the adjustment span you should make very small adjustments, like 1/16th or a turn at a time as the adjustment span is very quick and narrow.
Adjusting the first stage:
The 1st has been preset to accommodate most trigger internal dimensions. You probably don’t need to touch it and I strongly suggest that you do not change it. Proper adjustment of the 1st stage is necessary to avoid two things:
If the 1st stage screw is turned too far in (clockwise), then the safety toggle won’t work and the safety will not lock properly.
If the 1st stage is turned too far out (counter-clockwise), then the trigger blade will have too much forward travel and will have excessive free play.
Any setting of the 1st stage screw between these extremes is satisfactory and safe. If your trigger exhibits neither of these problems, then the 1st stage adjustment is okay. Otherwise, adjust it slowly (turning “out†if the safety won’t fully engage, turning “in†until the free play is removed) but not to the point that the safety will no longer engages and holds.
That’s pretty much it for the 1st stage.
If the trigger is installed properly it will work as designed. The complete installation instructions can be found here.
http://charliedatuna.com/MKIIGTXTrigger.htmThanks guys