Cast Lead Thread ?

[akaroa1]

Very nice mate I'm running the same style in 500gr in my 45-70 the first driving band is engaging the rifling upon chambering.
it is very consistent and accurate they are subsonic but still it seems unless I hit bone they will run the length of a deer and just split a boulder behind it.

I would be interested in measuring the bore rider 45 500s and seeing the mould

Not so much for my 1885 45-70 but that style would be good in a 45-90