Howdy Rowdy. Well Texas Parks &Wildelife sent me my answer back ,The answer was that the use of bp. cartridge guns is allowed (now) in Regular season( I think I knew that since I have been hunting with one for some yrs now).And that Muzzeloader only season is (muzzeloader only) well that makes sense too, but did not answer my question ,(Why cant bp. cartridge guns be used during Muzzeloader season). I am going to keep trying to get the bp. cartridge guns to be legal during Muzzeloader season. Muzzeloader season here in Tx. is held after Regular season.This yr. I think it starts Jan. 7 -20 . Keep in mind here in Tx. we can use muzzeloaders or bp. cartridge guns in regular season .This season usually runs about two months Nov.-Dec. And that is after our Archery season in Oct. So we can Start with Bows and crossbows for a month,then go to centerfire guns rifle or pistol bp. or modern,then a two wk Muzzeloader season. A heck of a long time ! Not asking for another season just let us use the bp. cartridge guns in Muzzeloader season. I dont think I or anyone would be taking advantage of the game hunting with bp. cartridge firearms after all other seasons are over ie. Muzzeloader season.The game by then are usually up to speed that they are being hunted .Will just keep plugging who knows , They might change their rules . Dusty Texian.