Hi i am a newbie here,lots of good info on this site!i have a 338 rum and have handloaded with good success 225 accubond and 250 gr.nosler partitions using h1000 powder,i bought some woodleigh 300 gr. soft point round nose. i prefer to use h1000 or possibly retumbo?has anyone loaded these 300grainers on top of h1000 and how many grains of it??thank you in advance for any answers..David