If have 357 magnum revolver but practice with 38 special will the aim / sights / point of impact be the same when shooting full power 357 magnum rounds?
^^^This^^^At typical defensive distances I cannot see there being a significant difference that would be cause for concern. I would make sure that both loads shoot as close as possible and call it a day. Splitting hairs in this case really is not worth it. As long as your carry round hits where you point, that what matters. When I had a 357, i carried 38's mainly because I shot them so much better to the point it was very noticeable on my targets. All the power in the world does me no good if i cant put it in the kill zone.
I didn't notice much difference... on the first shot.
On the follow up shots, point of aim was still pretty much the same, but I found it was much harder and slower to get back on target for follow up shots when shooting .357 instead of .38 in my S&W 640 snubbie.
I usually carry .38s in it, with one "Hail Mary" .357 on the 5th shot, for that reason.
That's a good thought, though I see one argument against it - muzzle flash. If it's dark and the .357 fireball is going to kill your night vision, perhaps better to save it for last, then your eyes may have time to re-adjust while loading.Just something to mentally chew on. If you can effectively draw and score with your first shot you might consider moving that hail mary full house 357 into the first round fired position. A solid hit from a .357 magnum is historically one of the best one shot man stoppers around. May not need the other four 38s and if you do the big damage is done on your first shot.
True that to a point. 357 will give you a bigger flash but 38 is going to give a decent flash of its own. Sort of a trade off. Either isnt going to improve your night vision. 357 will be brighter. Just for me myself and I personally if im putting off my first shot at 5 yards or less I want the round going first that is the most likely to end things on the first shot. 357 mag isnt the hammer of Thor but it has a pretty decent history of putting folks down with one shot if you do your part.That's a good thought, though I see one argument against it - muzzle flash. If it's dark and the .357 fireball is going to kill your night vision, perhaps better to save it for last, then your eyes may have time to re-adjust while loading.
There will be some difference, the degree to which will vary depending on ammunition. Most, if not all, 357's are rifled around the 158 grain weight. I know this because I have spoken to manufacturers like Ruger and presented that question to them specifically, and they have not only confirmed this but have told me the load they use to test their 357's at the factory (Ruger uses American Eagle 158 grainers). The velocity differences will affect your elevation probably more so than anything else. Any given 158 grain 38 Special, for example, will stay in the barrel longer than a 158 grain 357 Magnum. So the 38 Spl is in the barrel longer in the recoil cycle, hence the muzzle is rising longer before the round exits the barrel than a 357 would. The point of impact change is most noticeable at 25 yards, but can be seen in as little as 12-15 yards in my own experience. At normal combat distances (0 to 10 feet per may police academy days) you will not really notice the difference.Good points. I probably should have mentioned I'm primarly talking about more common self defense situation distances but also interested in differences for the occational long shot.