April 1, 2009, 02:46 PM
I have installed a Kart EZ Fit Barrell in my Colt series 70 45ACP. Everything seems to fit and lock up just as it should. However, it chokes on lead bullets that I have used for years in the stock Colt barrell. It looks as if the rifling edge ( leade ) from chamber mouth is closer than in the Colt barrell. I have to seat the same bullet much deeper or it runs into the rifling and the case head protrudes at least .025 past the hood. (230 gr lead RN, cases trimmed to .890). COAL needs to be about 1.213 to seat flush in the Kart. With the Colt barrell the same combo seats at 1.26. Does anyone have any insight to this? Normal, abnormal ?