new guy from Texas

Hi all, I have had a T/C Hawken .54 cal for close to 30 years. It has a 1:48 twist so I reasoned why it never was very accurate and I figured it was the twist rate. I have watched Idaho Lewis's youtube videos and found that with a few tricks my gun actually shoots pretty good with both ball and conical loads.
The problem I am now having is finding bullets and powder for the .54. I used Hornady Great Plains which are not made anymore so I am looking for a replacement for those. I used Pyrodex in the past which was ok but now I am looking at Triple 7. I am going to try a Mag spark 209 primer nipple in place of the #11. I have never tried black powder but it is almost impossible to find around here and don't want to do the hazmat fee thing. I hope to get some information from the people here about ways to keep my .54 alive and kicken!

Welcome to the Forum dpdpete, Glad to have you aboard

Welcome! Where are you at in Texas?

Howdy neighbor!

Welcome.  This is a great forum.  You'll like it.  
dpdpete maybe you might want to consider getting that Mag Spark 209.  I/ve used Pyrodex RS and P for years in my caplocks with only #11 caps and never had any issues.  As for bullets to replace your Great Plains bullets you can try No Excuse bullets.  They make a 54 cal 525 gr bullet. And they are top quality.
And if you decide to get into casting your own bullets you can get a 450 gr Lyman Great Plains mould for your 54.