Someone using heavy slugs in .177

I have a .177 rifle that shoots the h&n piledriver nicely at 50 joule. But they are not longer made and my stock is running low. Is any one using the 22 or 24 grain slugs from ZAN and with a nice result.

I have a .177 rifle that shoots the h&n piledriver nicely at 50 joule. But they are not longer made and my stock is running low. Is any one using the 22 or 24 grain slugs from ZAN and with a nice result.