Post by hillbill on Sept 16, 2021 6:55:27 GMT -5
Largely depends on the bullet weight and speed you want to get to.
keep in mind a .40 caliber Is VERY powder/bullet weight specific, they build pressure really fast, much faster than a .45 cal.
Give more specifics: plug used? 9/16 or 5/8: If you want a chamber you need to use the 5/8 plug because the .578 drill diameter makes for a larger dia chamber.
desired bullet weight?
also give barrel length and chamber or no.