While it's uncommon to find .22 WMR ammunition specifically marketed for revolvers, Winchester does offer a 45-grain flat-nose bullet in their .22 WRF (Winchester Rimfire) cartridge, which is a similar, though less powerful, round. Some retailers offer it as a limited production item for .22 WRF rifles. For .22 WMR, most flat-nose bullets are found in ammunition designed for tubular magazines in rifles, not revolvers.

Hi Nesley and welcome. Unfortunately, not in a solid flat point in 22 Magnum. Other options are 40gr or 50gr bullets. Cheers and stay safe!