I've been shooting 6.5g under a 158g missouri boolit, the 357 mag 18bh ones. They feel a little on the soft side to me. Is it safe to bump up the charge from 6.5 maybe to 7.5 without risking overpressure? I know some older manuals list a max charge as high as 8 grains while some newer ones only go up to around 6.8 for cast boolits. However the same manual may lists over 8 grains for a jacketed bullet. I like the way 7.5 grains feels with my xtps. Just curious what some opinions are.