Blair,

I'm using Fed 215 primers. I don't think I would use a card wad.

Actually the load you mentioned is too slow in my rifle. I carefully boosted my powder a bit to get good regulation and to match original velocity. What is your velocity?

I experienced a hang fire only once with a load of Varget in the .577. It seems to be a bit harder to light than the IMR4198. I have had no ignition problems with IMR4198 at all.

Glad you like the rifle. I think you got a great deal. I hope to see the rifle one day.

Best,
Curl