As long as you use proper casting methods there should be no problem with casting a tube. Make sure and vacume your investment to remove all bubbles , insure the wax tube is 5-7% larger than the finished size you need to end up with and watch your metal temp. and use the proper flux. Pourisity will be your biggest problem if you are out of the Silvers casting range or if the flask is not at the proper temperature.![]()


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