I have found the long barreled revolvers and my TC's often like the same things . I do not have a 41m 10" barrel at this time but my notes show that 22/296/200 Speer/mag primer was very accurate out of the 10" with a velocity a little over 1500 if memory serves me well. But I do know that the 22/296 load is very accurate out of my guns past and present.