I tried to convert .220 Swift brass to 6.5x50 and it didn’t go well. At the time I had a 22-250 reamer handy, so I hand turned it to open up the chamber. I then fired some old .250 Savage rounds in it and it worked but the fired brass had a small mark from where the reamer stopped cutting.
After that, it would group about 4-5” inches with the Remington two diameter 140 gr bullets- so I lost interest and rebarreled it.
Sent from my iPhone using Tapatalk