Cylinder throats on my Magnum Hunter are .430". Cast bullets l was shooting were .429". I started sizing them to .431". My target scores
Increased 20%. Proper sizing matters in bullets. The 429s were rattling
down the cylinder because they were too small. They hit the forcing cone
Off center just a bit..This affects accuracy.. 431s passed thru the cylinder perfectly aligned with the bore, hitting the target strait and true.. Hard cast bullets don't upset and fit the bore as well as swaged or jacketed ones do.