I recently purchased, and received, 1000 each Rim Rock Bullets,, Inc. 55 grain .25ACP bullets lubed and sized .251" diameter.
These are slightly heavier than the normal .25ACP 50 grain FMJ bullet and are of Cast Lead in a RFN flat base design wiht a single lube groove. They are about .500" long with about .200" of nose tapering to a flat meplat tip and are 'Bottom Pour' mold design, the base is mostly flat due to spru cut off.

Chev. William