I just loaded them like I did the other 3000 that has been through the bbl,when it was new the col was 3.265,,now I can`t reach the rifilings at 3.400 which is about as long as I can go and have ullet left in the case,,it may be a different lot of powder also,,I started to bump it a little but it still shoots good,,I actually saw 3500 back when the bbl was new but would get a flier ever now and then and backed down to 56 grs,,first time I clocked it in 6-7 years