There are a couple differences. The screw-in head includes the threaded shaft in its weight description and then your insert is threaded and hollow and weighed accordingly.
When you go to a glue on setup..which I think is what you are trying to say....you get a head that is 200grs without anything else...but your insert now has an additional area of taper for the head to glue onto. You can match the insert grain weights as close as possible but in the big scheme of things I do not think it will matter much even with the glue weight.
Reason being is as you sharpen your broadheads you will lose some weight....and if shooting fingers your release is not going to be perfect.
Best way to check and know for sure is to glue on a 200gr field point as a test....shoot it and it should fly perfect if your setup was good before. Be careful to mount the points and heads symetrically so they spin true for best arrow flight.
Good luck...but if you mount them very good....and try to match up the weights of your swaged inserts to the screw-in inserts....should be little to no change.
Answered on 10/17/2014 by Anonymous