That's the one: their No. 00335. IMHO the Wilson Case Gage is a must for reloading 357 SIG as well. I routinely check the cases after sizing, before new primers, expansion, powder, seating & the crimp. And after all's done, as well. I'll plunk test a couple in my 357 SIG barrels before I get into any real "production". There are variations in chambers, and with a bottleneck cartridge this can make a difference.

Belt & suspenders...maybe? So far all my 357 SIG reloads have fired perfectly.

A side note: resizing the cases with a 40 S&W carbide die 1st, then with the 357 SIG sizing die (most are not carbide) works very well for me. No need to lubricate so far.

Cheers!