There's a huge difference between the fbi load and the buffalo bore fbi load.

The main difference is the hollow based hollow pointed bullet in the fbi load.



That bullet can be duplicated with one of these hollow based molds from lyman.



The the load hollow based bullet will need to be hollow pointed using a forster hollow point tool.

The buffalo bore fbi load uses a 158gr lead swc hp that is gas checked. 20 rounds for $29

https://www.buffalobore.com/index.ph...t_detail&p=108

In 2012 Brian Pearce did an article on testing different 38spl p+ loads in a 1.875" bbl'd ruger lcr snub nosed revolver. He duplicated the Buffalo bore load using:
6.3gr of power pistol powder
158gr rimrock lead swc hp
standard primer

The buffalo bore load gave pearce 999fps in that lcr.
The pp load gave pearce 1004fps

g/ch .38/.357 mag 158 gr. SWC-HP per 100/ in a plastic ammo box - Gas Checked Cast Lead Bullets - Top Shelf Bullets

I've done allot of testing with power pistol in low pressure cartridges like the 38spl/44psl/45acp. The results have been extremely impressive.