I just got back from the range - it was actually almost bearable today - only 90 degrees
I took my Marlin 336 chambered in 356 Winchester and scoped with a nice Leupold 1.5-5x.
I had two cast boolit loads to try - both with the Saeco .358 gc boolit, cast from ww, air cooled, sized to .358" in a Lee sizer die kit and lubed with LLA. The loads were two diff charges of W748 - 39 and 40 grains. The Marlin liked the 40 grain load a bit better than the 39 grain load. There was no leading whatsoever - bore was pretty clean actually.
Here's the better of two three-shot groups with the 40 grians:
As you can see, 1 7/8" group. The other one was 2 1/8" - so they were hovering around 2" which I think is just fantastic for this rifle.
I was shooting from a rest.
Here's a pic of the Marlin:
Regan Nonneman did the rechamber and conversion for me a couple years ago and I've been really pleased with it.
I'm very happy with the results from this range trip and have determined that I'm going to do some deer whacking (if lucky) with this levergun and this cast load this fall and winter. While I've taken plenty of deer with leverguns (my very first one) and bolt guns, I've never taken one with a cast boolit. Have to remedy that...
I had thought of using my old 94 Swede sporter for the purpose - but the loads for it were most unsatisfactory... I posted that info up on the cb loads for military rifles forum.