I do. Mine is a .451 Model 98 (Elite Hunter) and it shoots great. An internet buddy of mine has basically the same rifle and his shoots equally great. Another buddy.......... they all shoot great!!
Here's my friend Ed's targets - his first four targets:

And here is my second target shot with the rifle (ever) using my homemade cast conicals:



The WhiteRifles link will get you a lot of good info and Doc has several rifles to sell at good prices but www.splitfireguns.com is the main distributor of White rifles now. I HIGHLY recommend asking for a synthetic stock and I also recommend the 98 over the Thunderbolt.