Here are some chrono results from 6-15-20 on the 40 S&W from a Glock M27 3.43 inch stock gun.

200 grain hard cast flat point bullet with 5.8 grains of Hodgdons Longshot and WSP and Federal 200M primers in new Starline cases loaded to 1.125" OAL

Win. Small Pistol Primers, 930.0 FPS, ES 20.03, SD 7.28

Federal 200M Primers, 933.1 FPS, ES 33.95, SD 12.12

Now with The same bullet and Unique with the Federal 200M primer, Starline cases 1.125" OAL.
3.8 grains, 749.6 FPS, ES 37.07, SD 11.26

Now this is what I have chronoed in MY gun with MY components and THEIR lot numbers. Nothing more, nothing less. The loads WERE worked up to slowly watching for pressure signs etc..

Change any thing and results will change.
Even the same loads will more than likely give different results chrono results on different days so there is no need to argue over the results or to pick apart my results
It is an ever changing thing.
I posted this as an informational thing only