in my 22" pallet stocked whelen, I use 200 gr hornady sp's and bl-c(2). started by seating bullet long, to where it was hard to close action. then turned seater plug down 1 full turn. powder development started with 60.0 grain and worked to 62.5, no pressure signs. 60.5 gr @ roughly 2700fps gives me a consistant 1" 5 shot group, if I do my part. good luck with yours--jim