I love the Garand action. It’s kinda like an American AK. Still, I’ve owned more than a few and hoped that I would get lucky and find an exceptionally accurate sample. That never happened. You should see anywhere between 2-4 MOA accuracy.
But hey, if you want one, you want one. I always had fun shooting them and popping stuff like clay pigeons out to 100 yards is within the Mini’s capability.
Personally, for me, I’m a bang for the buck kind of guy in the end and AR15s are more accurate, very reliable and cheaper. The equipment for an AR is cheaper too. For the price of a new Mini, you could get an AR, a bunch of mags and a good bit of ammo, unless you find a used Mini that happens to come with a bunch of ruger branded mags. Forget about aftermarket.