Now from another thread this is what Marshall recommended:
"Regarding a load for that little buck buster, I did some extensive agricultural depredation work in the orchards of S. Oregon before moving to Idaho a couple decades ago, and my favorite tool of harvest was a little .357 levergun loaded with our BTB 359"-185gFNGC bullet, 16.0g H110 and a WSP primer. Out of an 18.5" barrel it clocked a consistent 1860 fps with no pressure signs."
Winchester SMALL PISTOL PRIMER with H110... And others on that thread said Small Pistol was the way to go.
I'm not trying to start a disagreement here at all. But I am getting very different advice on primer size under 110 and 296. I just hope I do not need to buy a THOUSAND of each. (hahahaha).