I shoot bowling pins a lot (at least two matches every month). I shoot a 255 gr LSWC from missouri bullet company (Cowboy #9). I use a 4" 625.

OAL: 1.206
4.8 gr Universal Clays
804 feet per second

This gives me a power factor right around 203. It's generally acknowledged that a power factor of 190 is about the minimum you need to reliably move the pin four feet back and all the way off.

We get into a lot of 'discussions' about the various benefits of smaller bullet moving faster vs bigger bullets moving slower. But most of the guys I shoot with are moving into the bigger bullets slower camp. Even the top 357 shooters are using 180 gr bullets.