H1000 is gold these days, I’d use it if any was available. My PRC load is 77.0 gr Retumbo, 215M, Hornady brass, topped with 230 A-Tips. 3.7 coal gets 2890 with single digit sd. 28” 1:8 Bartlien. Shoots great at 1800yds and claims supersonic past 2k. You should do well with your combo.