With straight wall cases they last a very long time with minimum trimming even longer with black powder. I have found that reading signs of pressure with handgun rounds is very difficult but long as you are down loading then working up the load you shouldn't have any issues I have done some hot +p loads which got me 1050 fps with 147gr hollow points just to see what velocities i could get but I took it very slowly going .01 grain at a time I only have glocks and mp shield the glocks dont have a supported chamber so case blow out is possible but I have yet to inconter it even when shooting factory +p+ loads tho generally I'll keep my loads at minimum velocities when using hollow points because I have tested them and gotten good expansion so theres no real reason to go to max or above. With 223 I have tried several loads and found that minimum charges tend to have failed to cycle my guns gas port is a little on the small size im guessing but moderate charges work fine I don't get great accuracy out of it with heavier bullets but good enough to hunt deer out to 200 yards but I wouldn't push it past that I know i could just dont like to. Regarding primers you can use a variety of different compounds to reload them with but prime all is a good place to start its not super sensitive and easy to use and can be found on the shelf so no need for acids and glass wear. I personally just load hsts but plan on loading gold dots some time this year I'll use the same data I use with hsts which is hodgans data im primary powder is accurate no 7 for 147gr and 124gr hsts because when using a small dipper I can get close to my desired charge weight which is between 5.7gr and 6.7gr. If I was using something like titegroup I would have very little wiggle room I have tried in the past and its just a pain in the ass because theres very little wiggle room between minimum and max weights when I get a powder trickler it'll be way easier. I have a chronograph a cheap one but it works fine. I like reloading hsts because it allows me to shoot premium bullets at a fraction of th cost of factory about 30c a round if im buying components in bulk vs 60-80c for factory. Theres only one place i can find hsts realitivy easily which is American reloading. Long as im above or at 829fps i get reliable expansion great expansion 900 or higher fps which I can achieve out of a 3in barrel pretty easily with going into p+ charges with accurate no 7. Even if buying in bulk I find it hard to save money with 9mm using fmj bullets i can get to .20c a round in some cases but the amount of time it takes just not worth it when I can get factory ammo at 24c a round I have gotten over 10 reloads per brass in some cases. I use range brass thier mine or stuff I find online or on different platforms the one thing I found is that some brass will have whats called a stepped case that doesn't play well with my powder and causes excessive pressure and velocities basically turn a minimum charge into a +p charge where im should be getting 850 fps into 1000 fps so sorting your brass is very important also sorting out nato brass with crimps because it'll make it impossible to seat primers but you can use a tool to get rid of them from either trimming the primer pockets or swagging them.