Ammo for 640 pro
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Sol-Invictus
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The 110 357s are a good bet. Any of the 125 grain +P 38s also hit well.
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ContinentalOp
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I don't know specifically about the 640 Pro, but S&W zeroes their J-frames for 158gr loads at 7 yards.
Most people shooting J-frames report consistent POA/POI with 158gr loads.
I haven't found much of a difference between 130-135gr loads and 158gr loads, but most of my shooting is inside 10 yards.
I don't know if there's much, if any, difference between .38 Special and .357 Magnum.
It might help if you could give us more details, like make/caliber/weight/etc. of the ammo you've been using, what distances you've been shooting, and what differences you're seeing between each type of ammo.
Most people shooting J-frames report consistent POA/POI with 158gr loads.
I haven't found much of a difference between 130-135gr loads and 158gr loads, but most of my shooting is inside 10 yards.
I don't know if there's much, if any, difference between .38 Special and .357 Magnum.
It might help if you could give us more details, like make/caliber/weight/etc. of the ammo you've been using, what distances you've been shooting, and what differences you're seeing between each type of ammo.
ArchAngelCD
Moderator, SWCA Member, Absent Comrade
Just a note, most ammo will not shoot exactly to POA=POI, that is a fact. This is why we practice, to learn our SD handgun. I know my S&W M442 shoots 2" high and 3" to the right. I adjust my POA to compensate for that like most shooters using a fixed sight revolver.
Yes I know some sighting in can be done but I'm not always going to use the same ammo like with my SA revolvers.
Yes I know some sighting in can be done but I'm not always going to use the same ammo like with my SA revolvers.
Right on....... !!
Most small 38's don't have adj. rear sights ....
until you get into the K frames.
Kentucky windage is a must.
Most small 38's don't have adj. rear sights ....
until you get into the K frames.
Kentucky windage is a must.
Bill In Texas
Member
If you are that low with 158 grain ammo, chances are that it might not be the ammo's fault. Double check your sight picture with that 640. Mine is right on POA with 158 grain. Maybe a little color,(fingernail polish works well and is easy to change), on the top portion of the sight might help.
jay72
Member
I tried 158 grain .357 out of mine the other day and its by far the best I have shot in it. Right at POA.
MichiganScott
Member
Although I would prefer all my guns shoot to point of aim, I'm not too concerned if POI is a couple of inches off in a handgun that would be used at 7 yards or less. Applying Kentucky windage during a high stress situation probably won't happen.
