Mikee Loxxer
Member
I am in the process of loading some 7.5 X 54 MAS cartridges. I am pushing a 130 grain jacketed bullet with 30.5 grains of IMR 4198. In reviewing the loading data in the Lee reloading manual I realized the recipe called for H4198 instead of IMR 4198. What is the difference between the two? Should I not use the IMR 4198?