I haven't found a lot concerning these bullets, For me the bullet weight is important and the 140 grain 38 biullet has some promise for my carry weapon, but it is too light for my 6 inch L Frame and my 357 Max Contenders.
Having the "tip" gives it more expansion over regular hollow points at lower speeds. Except the slowest thing I shoot is 38 +P.
Do you have any loading data for these bullets?
Thanks,
Jerry