Federal personal defense loads?

[tommag]

I have a Ruger security six 6"bbl and ran some Fed personal defense 125 grs over the chrono. Holy speed demon! 1700-1740 fps.
I wanted to try loading some 125 jhp to approximate this load but only got up to 1475 before it got too warm. I was using Fed 200 primers with H110 and got up to 20.8 grs when I quit. I tried Win 296 with similar results.
Does anybody have any idea what the heck Fed does to get this velocity?

[Dale53]

tommag;
Here's your answer:

http://www.hodgdon.com/data/pistol/357mag.php

Note, that they are using a 10" barrel (no doubt a pressure barrel without a cylinder gap).

Dale53

[MtGun44]

Win 296 is H110, so don't expect more difference than lot to lot
variation, which is what they are, different lots from the same
mfgr.

Fed may be using a non-canister powder so you may not be able
to equal their velocites. Also note that they may be using 9mm
bullets to get faster velocity - might pull one and check diameter.

I can get 1400+ fps easily in my .38 Super with a .357 bore using
124gr 9mm Hornady XTPs. Real decent accy, too. Go figure. :neutral:

Bill