I am reloading some .338/.378 shell and I have a few different weight bullets. I can find data for the 200 Gr. up to 250 Gr. in my Nosler #6 manual. I have some 275 Gr. bullets that I want to load for bench shooting just to see how it performs. I can't seem to find any data for a 275 Gr. for any .338 shell. Using H1000 Powder - Have had good results with this powder, but I would buy whatever powder needed to ... Git Er Dun. For my Ruger #1 Anyone have any info - I would greatly appreciate any help.