I have a Ruger as well as an 1860 army replica. I used to own an 1858 Remington replica also. I say this just to qualify my answer. I've used filler and I've not used filler, either way works, but the best combo I've found is Wonder Wads. The wads prevent flash firing, and provide lube.
For the Ruger I use a charge of 30gr. of 3f with a .457 roundball and have "Minute of JackRabbit" accuracy. I've been looking at trying the Conicals and the "Ballet", but haven't had much quality time lately.
(edited for dislexia)
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-Tim-
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