With any rifle offhand, I find left to right is the main movement. I try to snap the shot when it passes the target. Elevation, not as much variation. Yes, we're all told to squeeeezzz the trigger slowly and not know when it's going to go off. But - to a certain extent that's NOT what I do in say silhouette, and with a set trigger. You will only be "spot on" for about 1/4 of a second. If you're too slow squeezing, you're going to be back off again when it goes off. I pull faster than you'd think....and shoot pretty good offhand too. Shot Expert Rifle in the military, AAA at BPCR, and after years of not shooting, was doing pretty good at .22 Silhouette last year. Shot elk off hand. And shoot off hand at the range every time I go, groups surpassing the black rifles with scopes at half the distance I'm shooting. The point is - it works for me.
The set trigger let's you fire fast, so I do. I try to have good follow through, and don't hold the rifle up too long. If I don't feel right about a shot, I lower it for 10 seconds, then start again.