I have a home brew rifle that is .50 caliber and since I have several rifles in this caliber I would like to have it bored out to 0.55" to use 28 gauge shotgun wads. Is there anyone on this board that has a lathe and 0.55" bit to do this boring? Right now the barrel is octagonal and 42" long but I would also like it cut down to 30" or less because it is very front heavy. I do not mind that it will be a cylinder choke as I usually shoot in heavy brush at very short ranges and do not particularly like heavy chokes as it tears up the meat. Any info would be greatly appreciated!