DAdams
I carry the 125gr. .357 magnum DPX in both guns. I wanted to stay with the same ammo for both guns. They are reduced .357 loads compared to the full house stuff. They probably give me a little over 1100fps which is a pretty good step up from .38 +p's - enough to make it worthwhile IMO.
http://www.hipowersandhandguns.com/can_less_be_more.htm
http://www.hipowersandhandguns.com/Corbon 357 Magnum 125 gr DPX Ammo.htm
It works out in the snubbies that I'm really packing about a 9mm performance gun. But it is a small revolver which is important to me.
To be perfectly honest with everyone, I just like the idea of packing .357 magnums even if mine aren't the hottest I could carry. Bragging rights with the boys I guess.
Expense doesn't bother me much since I use a nice cheap reload from Mastercast that replicates the POI and recoil of the DPX close enough for occasional practice with .357's.
http://www.mastercast.net/amo.htm
Once sighted in with the DPX, I don't have to fire many to keep current, as it were. I practice mostly with a low power .38 load and dry fire with the laser on the wall etc.
The replica load gets 1290 from a 6" barrel according to Mastercast. That's close to the DPX. 125gr. hollow points make them shoot pretty much like the expensive stuff IMO.
There's no doubt in my mind that a nice K frame would shoot better than the 640. But I carry concealed so I compromised. Still pretty smooth.
I carry a Ruger LCP in my jeans or shorts for casual use.
When I'm doing security, I carry the 640 strong side about 3:30ish. I wear a suit or sport coat often and when I do I carry the 340 in a Ken Null "City Slicker" rig. That allows me to access back up with my strong hand as well as draw while seated if need be. I have a belly band for the 340 as well. It sees use occasionally.
The 640 is definately my first choice for any action though.
I have the 305 CT's on the 640 and the 405's on the 340. I also have a laser on the LCP.
The LCP is carried a lot because of size. But obviously it is underpowered compared to what I really want to carry. I looked at a few very small 9mm's. But it seemed to me that they weren't enough better than the 340 to conceal. So it was drop back to the LCP or forget something smaller and flatter altogether.
Nice talking to you guys here in the 340 M&P thread again.