Powerfisher
I shot them in some competition for a while and found that sized and weight do make a difference. If you don't size them and you don't control the temperature real well there will be a difference in the pressure the bullet put on the sabot and there for the resistance of the sabot will change from load to load the powder will burn at a different speed and pressure and the poi will wander some. Lee
That changes the whip of the barrel to.