The mini will do fine as a calling rifle, I had one it was okay...but if you plan to shoot more than 3 rounds, your going to have to wait an hour for that barrel to cool so you can do it againn LOL.
Seriously though, the NEW minis are far better than the older ones most have given up on. They are still not as accurate as an AR. Mags and other accessories are also far more available for the AR. (mini mags kinda suck)
You can switch uppers/barrels On an AR, not so with the mini.
For the amount you will spend on a mini, you are pretty close to an AR already, heck, some minis are 750.00, I think I paid 800ish for my Oly K16.
and for the time/effort/$$$ you spend getting the thing to shoot, well youve already gotten into good AR pricing.
If you find out you hate the mini..well, its hard to dump them for a decent price.
The mini is a good reliable gun, just not a great one, but itll do the job.
Ive owned a mini, shot some others, and still have a mini 30 tactical (love it) so im by no means a mini hater, just giving you an honest answer.