Marrakai,

I could not for the life of me make Varget work in my A. Henry .577 2 3/4" BPE. I couldn't get it to burn. The first loads were with a standard WLR primer, and then I tried a Fed215. Still no dice! Very erratic ignition, and the one hangfire I have ever experienced. That was it for me. And my barrels are 28".

You are loading heavier bullets with copper jackets in your .577. That would give a better opportunity for ignition than what I have in mine. My lead bullets are 90 grains lighter, and I suppose they go happily sliding down the barrel on greased paper with much less resistance to the rifling and less inertia from the mass.

On the other hand, when loading N-for-B loads for my .450/.400 3 1/4" I have great success with Varget. And there I'm using a WLR primer. The expansion ratio is much less, and I suppose that accounts for the better burn.

I haven't tried Varget in my .500BPE. IMR4198 seems to work quite well. Nevertheless, I'll give it a try some day when I decide re-inventing the wheel is in order.

Best,
Curl