i bought a pro carry hd iwb leather holster from holster store that is made for a k frame smith for my ruger service six. i was told the holster would be tight at first but would break in and fit my ruger well. i got the holster the other day and there is no break in needed, the gun goes in smooth and has some retention but can be moved forward and back, there is no side to side movement. the gun is not tight in the holster, is the service six larger or smaller than a k frame? will my gun just get looser over time or will it stay the same? this is my first leather iwb holster, i just recently got a desantis owb leather holster. been using nylon all my life but now with my ccdw permit i want something that will last. the desantis is for a k frame too and my gun fits good in it but it to didn't need breaking in but isn't loose in it. thanks