I have a Remington #1 rolling block sporter with a 30" barrel that has had the barrel lined with a .357 caliber liner and has been chambered for .357 Mag. Firing factory Magtech 158 gr. SPs in it I get 1780 fps MV. I have tried some of the 180 gr premium factory loads and found that I am slightly flattening the primers. I hadn't planned on getting back into reloading, but I'm concerned about possible high pressures using fast burning factory pistol loads in a 30" barrel. I want to try some hand loads using a slower burning rifle powder and see what kind of velocities and pressures I get. Hand loads would also let me use some pointed bullets instead of the flat nosed or hollow points that are made for pistols. Anybody got any experience with this kind of situation?