I've never shot round balls, nothing against them. I was also wondering about the sabots that are made for round balls. No reason they shouldn't work if you really want to stick with the round balls.

My recommendation though is to try Hornady FPBs. They are a full-bore copper jacketed conical. No sabot, no lube. I know guys like to tinker with sabot-bullet combinations, but I like to take variables away rather than adding themif possible. I'm shooting them this year and have not used them on deer yet. I'm hoping some others will try them as well so we can get some reports of their performance on game.