With Hillbilly and others on this...
On the range or on my hip, it's always the same gun. While I have a steady (albeit small) rotation of CCW firearms, I shoot what I carry. Whenever I change my carry gun, I "proof" and FamFire it with at least 200 rounds before it guns in the holster to check for function and familiarize myself with the POA/POI, trigger, controls, etc. of that particular firearm. Shooting drills involving 100-200rds from the holster or low-ready every month keeps one sharp as well.
Small, compact "always" guns like my S&W 438 tend to go every time and get at least 50-100rds per session.
Looking at the amount of rounds mentioned above, it may seem like a lot, as well as out of the reach for some people's budgets, reloading is a heck of a way to off-set the cost of ammunition and is an enjoyable hobby to shooting enthusiasts.
A viable alternative for some may be to get a .22 conversion kit or a .22 version of your firearm, such as the LCR357 and LCR22. Cheap practice with the .22 then run a box or 3 of carry loads through your carry gun.
Just my two cents and some food for thought.
Regards,
Lucky