You (well, some of you) asked for it and we just delivered.
Announcing the Shockbottle ".40L" 100-round case gauge for long-loaded and/or lead and coated rounds.
This gauge has chamber-reamed SAAMI minimum-spec chambers just like our other gauges except we made the bullet bore .4015" straight through. This gauge is designed for shooters loading jacketed bullets over 1.20" OAL and/or lead and coated bullets up to .401" diameter at greater than SAAMI OALs.
If you do not load outside SAAMI parameters, the regular .40 gauge will be a better check.
Check your firearm has sufficient barrel leade as excessively seated-out bullets will not be caught and can cause problems including magazine jams, excessive pressure and out-of-battery ignition.
Part number CG40L-100. Limited introductory supply, so pester your favorite suppliers soon.