Mike Hill, I shoot a lot of heavy loads as I use what ever groups the best with in the rifles capability. 130gr APP-ff with 250 shock Waves and 250 XTP's and 150gr with 50/40- 200gr & XTP's; this is pertainent as heaver loads and fast burning powder burn them up faster.
So I get about 6 pounds of powder to a breach plug but I should be changing at about 5 pounds. Theres 7000 grs to a pound so I guess 250 to 300 shots to a plug in my Omega. Lee