the tc pa hunter in 50 cal has a 1-66 twist, i bought a used tc pa hunter barrel and shortened the ram rod piping under the barrel and it fits right in my tc halkens, the pa hunter has a shorter stock and thats why you have to shorten the piping to fit the longer forend on the halken. you will notice the difference in the rifleing between the barrels right away,the round ball 1-66 in deeper. eastbank.
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