357 sig with 358-125-RF and Hodgdon LongShot

[Krh1326]

Hi All!
I ordered a Lee 358-125-RF to use for 357 sig.
I cast some up, from L#2 and made some dummy rounds. The COL, utilizing that BEAUTIFUL crimp groove, and a Lee factory crimp die, came out dead nutz 1.14” ( the actual published COL for 357 sig) I couldn’t be happier, worrying about the dreaded set back, and they plunk and turn, real nice, in barrel.
Now for the charge. I’ve stocked up on Hodgdon LongShot, to use in this and the .40 SW barrel.
Ive found tons of published data for the .40, but the 357 sig is different, and rare, it seems.
Most of what I have found, so far, is forum posts of “users load data”.

Asking you folks here, if anyone has a source of published data, for this… and…. Does anyone have some pet loads, with these parameters?
Thank you for any help!

[fastdadio]

I just looked it up at Hodgdon load data on line. They say;
Start @ 7.0 grs. 1,254 fps. 30,200 PSI
Max @ 8.0 grs. 1,351 fps. 35,800 PSI
COL 1.140"
Good luck, be safe, have fun.

[Krh1326]

I did not find that… hmmm. May I ask what was the boolit that you found that for? Jacketed?

Edit: ahhhh just found that for Bar TacXP .. I think that is the all copper? Researching now. Would that follow the - 10% formula?

[fastdadio]

I did not find that… hmmm. May I ask what was the boolit that you found that for? Jacketed?

Edit: ahhhh just found that for Bar TacXP .. I think that is the all copper? Researching now. Would that follow the - 10% formula?

Yes that was a copper clad projo. I use jacketed data for my cast all the time. Never had a problem, and yes you could start at 10% under listed start load. I use Longshot in .44mag and .45acp. Good stuff. It's my best powder for my start/mid loads in .44 mag with 280 gr cast.