I noted the trend was away from the 40. I cannot tell if you are agreeing or disagreeing.
The FBI wants a flat shooting cartridge. The Secret Service and Federal Air Marshals use 357 Sig ; which is a 9 mm bullet ( .355 diameter bullet ) in a necked down 40 caliber case. The .357 Sig ammo is more expensive than 9 mm. 9mm +P ammo is close to the. .357 Sig and .357 Magnum ( .357 diameter bullet & 38 caliber ) - but 9 mm ammo is cheaper . Less muzzle blast so it would be easier on the ears- less recoil and 9 mm is less wear on the handgun than the .357 Sig.
Back some time ago it was shoot the perp two or three times . Now the standard in Law Enforcement is shoot till the threat is stopped. Times ago if you shot a drug crazed criminal six or seven times the Cop was the bad guy. Now ..... The standard is shoot as many times as you need to stop the perps.
Sig Sauer is famous among Federal Law Enforcement ; especially the Secret Service and US Federal Air Marshals. If Sig gives the FBI a good price based on bulk sales for other Federal Agencies; they will go with a P229.
If Sig does not give the FBI a good price- I expect Glock 19s and Glock 17s to fill FBI holsters.
Sig has their benefits over Glock and Glock has their benefits over Sig.
Shadow 355