I got in a Joe Woods coning tool in .54, I am going to give it a try on my pre-carve from hell rifle that shoots poorly, is very hard to start a ball in and cuts patches at the muzzle to see if it makes any difference.
I headed out to pick up the right grits of wet or dry sandpaper and was in for a surprise; Lowe's grits start at 800 and go up, the same for Home Depot, Auto zone didn't have it, Advanced Auto parts only had a couple of grits, O Riley's had the right grits but it was the cheap Chinese stuff that Joe warned about in his instructions.
Amazon to the rescue, they had a pack of 3M with all the right grits, they also had the low traffic carpet tape Joe recommended, delivery is a week away.