fourdollarbill
Member
I have been chasing accuracy on a Lee bullet for a while now and I think I came up with a zinger. It is a Lee .358 158gr LSWC with gas check and I have worked through fliers and terrible accuracy.
I tried everything in the book: 2400, Unique, H110, crimp style, casting voids, alloy changes, 4 different revolvers (3"-6"), other shooters with more experience, etc... I went from 10" groups down to 4" groups at about 20 yds shooting off a sand bag. Pretty pitifull aye? I could load any other (factory made) LSWC and shoot one hole groups off a sand bag at 20yds all day. Throw out that mold and buy another style. Not so fast... Long story short I tried seating and crimping with a Lee FCD in two steps and that bullet really tightend up the groups by a long shot. Not as good as a 158gr from MBC or OT but pretty darned good. It was not the crimp it was the post resize sqeeze it put on the bullet. Does it make sence to you? Well the last 50 I cast and sized to .357" with gas check and I can shoot much tighter groups and the occasional one hole group.
I'm not very well educated on barrel and throat slugging mathmatics but the home town self trained gun smith I paid $10 to do it claimed I should be shooting .358" (average .3584" to be exact). I don't doubt his measurements as all other cast bullets work great sized to .358".
Oh well it works.
I tried everything in the book: 2400, Unique, H110, crimp style, casting voids, alloy changes, 4 different revolvers (3"-6"), other shooters with more experience, etc... I went from 10" groups down to 4" groups at about 20 yds shooting off a sand bag. Pretty pitifull aye? I could load any other (factory made) LSWC and shoot one hole groups off a sand bag at 20yds all day. Throw out that mold and buy another style. Not so fast... Long story short I tried seating and crimping with a Lee FCD in two steps and that bullet really tightend up the groups by a long shot. Not as good as a 158gr from MBC or OT but pretty darned good. It was not the crimp it was the post resize sqeeze it put on the bullet. Does it make sence to you? Well the last 50 I cast and sized to .357" with gas check and I can shoot much tighter groups and the occasional one hole group.
I'm not very well educated on barrel and throat slugging mathmatics but the home town self trained gun smith I paid $10 to do it claimed I should be shooting .358" (average .3584" to be exact). I don't doubt his measurements as all other cast bullets work great sized to .358".
Oh well it works.