Question for 41 Long Colt Owners

[jethunter]

I've measured groove diameters in guns chambered for 41LC from 0.401" to 0.404"
Colt M89: 0.401"
Colt SAA: 0.404"
Possibly the SAA had some erosion but it looked good with fairly sharp lands.

What dimensions have you found?

 

[billdick]

.408 and .411 and both thunderers. Thats why I use hollow base bullets

 

[41 Colt]

Don't remember exactly but have owned several and they were all over the place.

 

[snurge]

My 1889 da mics at .400