My total arrow weight (Bare, with just 3 feathers, painted-on cresting, insert and nock) - is right around 200 grains.

The 255 number was the 200 grain arrow with a 55 grain head. 3.64 grains per pound.

So Gary -what's your honest opinion about how that 57 grain Rocket would perform out of that setup. That would be a 257 grain arrow, probably in the 360-370 range. Would I be okay if I just added maybe a second rubber band?

That was the game we used to play with those Punchcutters back in the day. It seemed like the faster bows were pushing them open, so we'd just add a second rubber band.

Greg - I like the MX3, but I've already got a zillion 3-blade Muzzy 100's at home. It would be nice to make the upgrade, but not worth scrapping the ones I already have. If I stay with a 100 grain fixed blade, I'll probably just use the ones I've already got stowed away.