Like you had stated chamfer the chambers. Best thing you can do for using speed loaders. All you do is break the sharp edge of the chamber opening. I did my GP-100 and I now can use TCFP without issue along with RN
NRA Life Member, NRA Range Safety Officer, NRA Certified Pistol Instructor, IDPA Safety Officer, USPSA NROI Range Officer,
As you are, I once was, As I am, You will be.