If you can chronograph your loads, you can get them in the range they were designed to run at.
That would be significantly hotter than a 9 x 19.
You might find this some interesting reading:
http://smith-wessonforum.com/smith-w...sw-barrel.html
Here is some data I have collected from board members over the years;
Sierra - 6.3grs. Universal w/Sierra 125 - 1300fps & 469 ft.#
You can use 9x21 data but standard 9x21 is the same as 9x19.
What you want to find is load data for the 9x21 used in IPSC/USPSA to make major.
The 356 has a much stronger case and can handle higher pressure than what the 9x21 was originaly designed for.
All 3 use the same max overall length of 1.169" with round nose bullets.
It's usually best to stay around 1.135-1.145" with flat nose so they'll feed well in the mag.
The Federal Gold Medal was 147gr@1250fps in a 5" barrel, while the Hydra-shock 147gr was more around 1080fps,
which made it basicly 9mm+P.
Any 9mm+P load would also be a good starting point,
the main thing to remember is that there is very little case capacity and just a little increase in powder or shorter overall length will increase pressure very quickly.
Normal 9mm dies should be used.
The S&W 356tsw is a 9x21.5 tapered just like the 9mm x19.
You can not use a straight walled die like the 38super.
I was given this load by someone on the forum that has been using this load for quite some time and that has proven to be the most accurate for him in a 5 inch 3356.
124gr FMJ .355 9mm bullet
7.5gr. Accurate #7 powder
OAL 1.165
Use premium bullets less expensive bullets very too much and will not be as accurate.
Here is a little more;
Federal or Starline brass. - .356TSW
Primer Winchester WSP
Powder: Accurate #5 - 6.9 Gr.
Bullet: 147 Gr. Remington FP Match
AA#5 9x19mm cart Overall length = 1.169", Win 115 gr .541", RP primed brass, Kel-Tec P11
0) Minimum charge to cycle pistol........ 5.0 gr 800 fps 12,000 psi
1) 9x19mm.................................7.7 gr 1260 fps 34,000psi
2) 9x19mm +P............................. 8.0 gr 1324 fps 37,400psi
3) 9x19mm +P+............................ 8.3 gr 1353 fps 40,800psi
4) .356TSW............................... 9.1 gr 1455 fps 49,000psi
5) Primer pierce, case bulge ............10.0 gr 1600 fps 65,000psi
6) Case failure[hole] threshold [kaboom].10.7 gr 1700 fps 81,000 psi
7) Case head separation [big kaboom].....11.5 gr wrecks extractor and hold open
I hope this puts the load in perspective.
9 m.m. - 115g. - 8.7 - #7 - 1.135-1.145" with flat nose
Here are the chronographed velocities for these two loads in a PC Model 3566
Federal 147 gr Match - 1167 fps/445 fpe
Corbon 124 gr BHP - 1356 fps/506 fpe
Hornady 115 gr XTP-HP/8.4 grs WAP/1358 fps/471 fpe
Hornady 124 gr XTP-HP/8.0 grs WAP/1303 fps/468 fpe
Hornady 124 gr FMJ-FP/8.0 grs WAP/1290 fps/458 fpe
Remington 147 gr FMJ/6.9 grs WAP/1110 fps/402 fpe
New Starline brass, 6.2 grs. Universal powder, 124 gr. gold dot HPs, Win. SP primers
Regards,
BM1