I am new to the site but I have killed many whitetails with the .357. I use a New Model black hawk 4 5/8 stainless. I live in the Catskill mountain area of NY. The deer are not very large 150 to 160 sometimes but usually smaller. Jerry is right a good factory 158gr sp works great. But I have been for the last three years testing the 125s in my shorter barreled gun. My limit is 50-60 yards but most shots are 40 and closer. I have been using the 125 Remington umc ammo. I do not reload. This ammo is very accurate they advertise it at 1450 from a 4inch barrel, but I am getting between 1550-1600fps. I have shot three deer with it. a spike last year at 30yards broadside through both lungs. Lungs shredded and bullet in and out unrecovered. Doe year before, 40yds quartering to. Bullet went in just infront of left shoulder took out front of left lung and heart, bullet in and out unrecoverded. Third deer large doe, facing me head on 25 yards. Bullet went in took out heart and part of the back of the right lung and stopped in right hip. Bullet exspanded nicely alot of damage in all three deer and penetration very good. Now with this said I prefer soft points over hollow points. I like the remington bullets they use in their ammo whether it be 125 or 158 grains. The three deer died alot faster with the 125s than the many others I have shot with the 158s, and the deer I have shot with 44 and 41 mags. This is at short ranges, I can not give you any exsperience on longer shots over 50 yards. I am still testing the 125s so far so good, but more time is still needed for a true assestment. But I am really starting to like this ammo.
Bryan