You can get the Dynamit caps at Sportsmans in Federal Way but persoanlly I would just stick with the TC even if it's shorter doesnt allways mean your range is shorter. My TC Firehawk is only a 22 inch barrel and I have killed animals out to 130 yards with a 310 grn knight sabot and 100 grains of powder. to me it's all about what you are confident in, you may think you have extended range but when the moment of truth comes extended range means nothing if it doesnt fire or accuracy may be comprmised if you are worrying about it.