I've mainly been using IMR-4227 for my subs. Here the closest load I have to that Lehigh:

Platform: AR-15
Barrel Length: 9.5"
Bullet: Hornady 208 gr A-Max
Powder: 9.4 gr of 4227
Primer: CCI 400
Avg FPS: 1030

This will cycle, eject, and bolt hold open without a can.

I've got a bottle of Trailboss I've been itching to try out in my 300 Blk Handi rifle but I haven't gotten around to trying it out yet.