I have found, if you shoot at a noisy indoor public range...cell phone timers are usually not loud enough for you to hear effectively....but good to hear it works for you. An ear bud ... & phone on belt might work.../ but I use CED 7000 timer .
I had a good practice session today...200 rds ...9mm...Wilson 5" Protector. Target at 7 yds....( working on grip, staying in a smooth cadence on followup shots )... struggling with prescription in new bifoculs after cataract surgery...
100 rds or so in...
Draw fire 5 rds..in under 3.7 sec( I avg about 3.3 sec)
Draw fire 4 rds ..in under 3.2 sec( I avg about 2.9 sec)
Draw fire 3 rds ..in under 2.8 sec( I avg about 2.6 sec )
100 rds or so in...
2 mags of 4.../ Draw fire 4 ( gun goes to slide lock)...speed reload & fire 4 more rds ...in under 7.3 sec ( I avg about 6.8 sec )
I missed 2 shots/both on reload drills...( bad reloads, rushed my shot )....1 at about 9 O'clock ...and 1 high into face ( both are minus 1 pt areas)... target is center mass in 8 1/2" X 11" rectangle on ICE target.../ both misses were on reload stage.
But this is as good as I can shoot most days...at 68 ..and poor eyes...