The V-1 (B-1) sporting revolver cartridge was developed for accuracy - not velocity or stopping power. It is exacly the same situation as .38 special wad cutters used for target shooting in a .38 special or .357 magnum. The most accurate loads barely get the bullet out of the barrel! I buy the V-1 ammo EVERY chance I get - I have a TOZ-36 and several MTs-4 which love it.
"Never increase, beyond what is necessary, the number of entities required to explain anything." William of Ockham (1285-1349)