My Lyman # 47 gives a maximum length for 357 at 1.590. I would check cup pressure for your intended data. 357 has a cup maximum at 45000 psi. Unless you are close to or over max cup I don't think it would be a problem (disclaimer this is my opinion so take with grain of salt). Another option is call Hodgdon and ask them about the information. Also since 357 is safe to shoot 38 special in may not be issue. I load to 1.55 since my Rossi 92 is finicky with short rounds.
It is for my leather jacket. I have some already on it dut have coupl pockets still need them. I choose size based on which zipper. with gloves on does make easier.