HYDRA-SHOKz
The 135 grain corbon load is a good one and it is what I used to carry before I became a 357 sig convert. I stopped carrying the load however for several reasons: 1. it was terribly in accurate in my carry gun at the time (sig 229), 2, It was not as fast as advertised it averaged 1280 from my sig 229 while the same gun with a 357 sig barrel did 1380 with 125 grain loads, 3, Corbons quality control has gone down hill and I had some dud rounds and some other problems. I no longer trust corbon. I like their philosphy just not there sloppy manufacturing. Also where I live I have fly out to get ammo anyway and 357 sig rounds are plentifull in Anchorage and they cost the same as 40's. SO if your 40 usp is truly accurate then great but my expierence with the 40 has shown that it is not as accurate as the 357 sig nor the 9mm,45 or 10mm.
So by all means stick with the 40 but I challenge you to try the 357 sig I think you will like it.
PAT