I discovered that using a quality hand grip (e.g., <<http://www.heavygrips.com/
>> has minimized oscillations
when pistol shooting ( .45 NM, and .22 M41. )
My regime is during the day to start with the 150 lb version
in sets of 20, first in spring coil at 12:00 position, pointing up;
20 in 6:00 position, pointing down.
Then I proceed to the 200 lb version - sets of 10 up&down pointing.
[ I cut a thin bicycle inner tube to sleeve the grips. The knurling
is a bear on the hands and fingers. ]
Next: hold the 200 lb closed for 10 secs. as if I was aiming at a target.
Up the down position in turn.
Added benefit: seems that military M.D.s have seen a secondary
benefit to pilots is that it aids in reducing blood pressure.
Being over 70 I find that I can still hold my .45 with minimum
Hope this adds to your information data base.