I own two puncher breaker Krals, in both calibres. One has been trouble free, the other was bought as a project and although a pain to sort is now spot on. The early punchers suffered with rubbish mags, fragile valve stems and rubbish .177 barrels. All that has now been sorted and would recommend them. Range right the importers are superb to deal with, with a great gunsmith. It's a shame Kral didn't get it right in the first place as I think a lot of damage to their name has been done.
With regards accuracy my .177 loves bisley mags and the .22 rws super field, both hitting spinners at 50 yards with ease. The new mags are flawless, the guns are built to last