Slugged my Governor Barrel

[The Old Salt]

Slugged my governor barrel. Pushed a 45 cal 230 gr LRN bullet through it. Bullet measured 0.450" Dia after slugging. A little tight for a 45 LC barrel, but it shoots them OK. Anyone else Slug their barrel and if so what did it measure?

 

[The Old Salt]

Re-did the test today. Its a 7 land barrel. Set up the caliper on the low spot created by the lands and rotated the bullet. Got it at 0.450" to 0.451".

 

[Sarge]

That barrel will certainly shoot up to the platform. Have you measured your cylinder throats?