iam trying to fig out what powder to use for a 165 gr cast boolit for my 303 #4 mark1 i have some h4895 now but i was thinking about getting some trailboss if i go with that what is a good starting load for around 14 1500 fps
i was also looking at the unique to if i go with that what would be a good starting point for the same fps
somebody told me for the unique 13grs would be a good load and it would be about 1500fps if i go with the unique would i need a filler or no