I've owned an smk b2 .. whilst they are good value for money you can forget target shooting at long range with one. I was happy with mine being able to group around 3 inches at 30 yards. Biggest problem i found is the trigger which is very basic & has a horrible stiff unpredictable pull that makes accurate shooting virtually impossible. A tuned one may well be better but still not up to much.

Even Spending an extra £50 or sumin on a 2nd hand rifle would do yourself a favour in the long run.