I really couldn't tell you other than I got an excellent deal on here. Somebody was selling 5 gauges, 223, 9mm, 45acp from egw. The other two were shockbottle 9mm and 40. for 300 bucks plus shipping.
Mid last year I bought the 223 from egw for 200 bucks alone! So it was an excellent deal...
Item Name: FT 357 SIG
Location: Douglasville
Zip Code: 30135
Item is for: Trade Only
Trade Value or Items Looking For: 357 mag, 38 special
Willing to Ship: No
Bill of Sale Required?: No
Item Description: Trying to help a friend out, he's got this 357 sig and wants to trade for 357 mag or...
I don't this this particular media would do that. It is very fine, almost like trying to hold water in your hand. Smith did make some 586's that were bead blasted and they look really cool.
Maybe if you got some more aggressive media it would work, but that is really never what I set this up...