Okay, in colorado the bullet can not exceed twice the bores diameter.

Measured the land/land, i come up with a .452 DIA. And a .461" Groove/groove.

So a .904" long bullet would be ok by this measurement.

Is this the correct way? Or would i just have to say ok its a 45cal so .45 X 2 = .990"

Im getting ready to order some Bullshops if dan has the grain and size i need. I want something in the 300 minimum to 400 grain range.