45 Winchester Magnum & 260 Hard Cast Lead

[renaissance]

OK
I get it
45 acp dies ( I have some ) should load 45 Win Mag fine.

I also have some 260 grain Hard Cast Lead 45 acp bullets (.452 I think)
What load ?
I want to drive them hard, but I don't want to lead up my 16 1/4 inch TC Barrel.

What Powder - How much of it ?

 

[BigdaddyG]

I have a Grizzley and the rifling is quite shallow and it wont take lead at much over 1,000 fps without a gas check. I see your using a T/C and I have no idea what the rifling looks like in those. I would use H110 or Win. 296 with a max charge of 23 to 24 grains (work up to it).