Stock Mini's are WAY overgassed. (For reliability and so Ruger doesn't have to tune guns.) You will have no problems with Min loads with a stock bushing unless there is something wrong with your gun.
My 580 series Mini, whose stock bushing is in that photo, runs Wolf ammo 100% with an extra power recoil spring and a .045" bushing. My 184 series Mini, bushing also in that photo, runs 100% with a .050" bushing and the stock spring.