Many many years ago , I took my brand new 8 3/8" S&W 29 to the range to sight in. At 25 yards my light reloads , 245 gr. cast bullet at about 900 to 950 fps. printed about 8 inches high with the rear sight bottomed out.

A gentleman at the range asked me if I had any hot loads with me. Shot six 240 gr JHP at about 1250 to 1300 fps which centered up very nicely and chewed out the center of the bullseye.

I never noticed the problem with my 4" or 6" .44 ,,, but it made a big difference with the 8 3/8 barrel...