Just to review...….cast slugs of dif. diameters tried in Daystate Wolverine .30 cal., also in Air arms S-510 in .25 cal, cast pellets tried in both the .30 and the .25, no success at all! Nothing close in performance to JSB and H&N pellets in those rifles. Cast slugs have been less then ideal in .22 cal. PCPs as well.
Enter the Sumatra 2500 in .22, using 34 gr. cast hollowpoint bullets accuracy or under 1/2" at 50 yards, these are my homecast .225" bullets sized down to .218" on NOE and Star sizing equipment. Much more testing required to optimize performance with commercial pellets at the lower power settings, which will also optimize(reduce) air consumption. This Sumatra may be my best PCP yet, cheapest too!