As noted, one option is to use a lighter powder charge and load short. While this in usually safe there is a small risk of pressure spikes that can rupture a case. Typically this is not life threatening but a case rupture is almost universally rather painful.

The second option is to contact the barrel manufacturer about this issue. IMO you have a barrel that wasn't machined completely to SAAMI specifications for the Chamber and Lead. My hunch is that your barrel was machined specifically for Semi-Wadcutters and using any other bullet type may be problematic. Since it shouldn't be too difficult to re-machine the Lead in your barrel to a profile that works with a variety of bullets I would suggest you contact the manufacturer about having it machined for general use. Yeah, you will in theory lose a bit of accuracy but most of us can't shoot a handgun well enough to ever see the difference.