Basically, adding weights does 3 things.
1, It changes the weight distribution(CG).
2, It changes the mass of gyration affecting the period of gyration of the muzzel, in both frequency and amplitude.
3, It increases the overall weight of the pistol .
In general, to slow down the frequency and amplitude of the muzzel movement, it is desireable to have the added mass (weights) as far foreward as humanly and mechanically possible. The normal routine of adding weight , and then sliding it back and forth for ballance, is not optimum , for as u slide it back for ballance, the muzzel WILL GYRATE MORE. Is this perceptable? In a game where the world champion can be determined by 1/10 OF 1 point, ANY mechanical or mental edge is important! Acording to physics, the correct method to get the ballance, and the maximum benefit of the gyrating mass (slower and less muzzel movement) is to determine a mounting method that puts the weight as far foreward as possible, and ALWAYS mount it in that position. This optimizes the use of the required weight , giving minimum muzzel movement for a given mass.
BALLANCE should be independant of position , and is best achieved by varying the AMOUNT OF WEIGHT APPLIED, NOT its location. This also allows for the lightest overall weight of the system(pistol)for a given CG and muzzel mass.
Obviously , adding a heavy weight near the trigger guard to correct the CG, would not be nearly as affective as addding a much lighter weight 12" further foreward,and would adversly affect the total weight and would do little , if anything, towards slowing dowm muzzel movement! Hope this helps in your quest for an optimal weight system. And yes, adjusting the CG and adding mass to the muzzel WILL help, if properly applied. Properly fitting grips which allow u to better controll the total weight also help. (shameless plug, lol) regards, seaton :)