Bianchi x15 size 4 model #12365 - Bianchi X15 Shoulder Holster

I like 6" revolvers and have S&W M29, M629, M686+ and a couple of Ruger GP-100s. The Rugers and M686 are 6", the M29 is 6 1/2 and the M629 is 5 1/2. So I get this holster, size 4, model #12365 (right hand) which is supposed to fit up to 6 1/2 in barrels. When I first put a pistol into what I thought was the proper position in the holster, I had almost 3 inches of empty holster on the barrel end and the retention straps didn't work right. So I thought I had bought a holster that was too long. However the package label said it was for 6-6 1/2 barrels and I kept playing with it and discovered there is a leather edge inside the holster that caught the cylinder and made me think that was a far as the pistol should go but I eventually realized I needed to push the pistol past that edge and then it slid all the way down to where it was really supposed to seat. Then, perfect fit for all my revolvers and the retention straps fit also. It wasn't the holster that was wrong, it was my dumbass. With regard to the excessively tight fit, I left my M629 in it for a couple of days and the holster seemed to adjust to it and now it is perfect. These are excellent holster, hope this helps for others looking at them.