In this segment we ran through all the different features available in caulking guns. There are a lot of choices and a lot of prices.
You can get good, or bad, incremental movement from the trigger. If the gun forces you to squeeze far before getting a fresh grip, it will tire out your hand.
Some guns include snipers for cutting off the tip, others provide the poker to break the seal deep down in the nozzle.
As with most tools, the better the gun, the easier the job.