Looking for a decently accurate pellet for a Crosman F4 Nitro Piston rifle. Tried some Winchester round nose, which are pretty descent but got a good many fliers. Tried Crosman pointed pellets 7.4 gr. that do ok. Tried Daisy precision max that was a waste of money. Looking for something in the 8 - 9 gr. range that won't break the bank. If anyone has an F4, what works well for you? Thanks in advance for any info.