You and I have basically the same rifle. Mine is 51" long with my TBAC Ultra 7 using the CB mount. I have cases that are long enough, however I take my can off all the time with no problems. I can personally vouch for the Armageddon Gear cases. They protect and are extremely durable. I have several.
Now for my experience. The TBAC Ultra 7 mentioned above is using the CB mount and gets moved between a couple of bolt guns and a few ARs. I have a SilencerCo Saker 5.56, Omega 300, and Hybrid 46 that all mount on the ASR mounts. These cans get moved around among several more AR's of various calibers. The Hybrid 46 even gets switched out for use on pistols. I have an OPS INC 12th Model that gets moved between 3 AR's and a bolt gun regularly. Lastly, my TBAC 338 Ultra using the 338BA brake gets moved between 4 different caliber conversions for my DTA SRSA1. So while a FNG here, I have been shooting a long time with suppressors. I do not see POI changes from removing my suppressors regularly. The common feature among all of the mounts I use is there is a taper to align the can. My direct thread cans stay mounted on a couple of dedicated truck guns.
To practice for my WY elk hunt last year I spent weeks going to the range and shooting from 275 yards to 500 yards. I went through 70 rounds in the weeks leading up to the hunt. I would set up my Elk vitals steel hanger and walk around the field to different spots to shoot from. I would set my rifle up on the tripod, range the target, adjust if necessary and make the shot. Each session would be 6-8 rounds. So do what works for you. I do recommend you test your setup.