I have never shot one and I have heard that commercial ammunition is expensive.
Where I shoot, a fellow who did not want to pay the price of commercial ammo, decided to roll his own.
Don't know if he drastically undercharged the case or used the wrong powder, but he blew the gun up. He was injured, the guy in the next lane was injured and a guy I shoot with was hot by a piece of shrapnel that left a welt but did not break the skin.
There was not a salvageable piece left of that gun.
If you buy one and decide to reload, you really need to be careful.