If you'll check my post on .357 chamber specs you will find they have a very long and sloppy chamber. For that reason I would suggest 180 grain bullets seated out as long as possible to minimize the effect of the "throatless" chamber. The chamber is so long that some people are using the longer .360 Dan Wesson brass in the the factory .357 mag chamber. With the Remington 180 JHP bullets and top end loads I think it is a 150 yard rifle but that is pushing it, 100 yards is more comfortable.