I absolutely understand the "no lead on indoor range" issue, this is quite common. In your spot, I'd be looking for a plated 250gr bullet. That would give you a very good bullet, a proper bullet, and at much less cost than even an XTP, let alone an FTX.
Obviously, these bullets are a bit hard to get right at the moment.
Berry's makes a fine one for this application, if you could just find someone that has them. Berry's has basically disabled their website at the moment as they find themselves focused entirely on making product for their largest retailers.
You might find some of them at a Cabela's, as they carry Berry's bullets.
Also, check your PM's.