Originally Posted by hermannr
...I'm not sure about the "lent" weapon has to be transfered...if it never was originally transfered to the range that borrowed it, there should be no need for a transfer back to him...it was a loan...
 It was "lent" an indoor range which presumably has an FFL.
 18 USC 922(a)(5) has an exception for temporarily loaning a gun to a resident of another State for sporting purposes. The handgun in this case was transferred to an FFL for business purposes.
 18 USC 922(a)(3) dealing with a transferred gun cross state lines has no "loan" exception. Essentially, you can't loan across state lines.
 This has been addressed in great detail in a number of other posts, and I've posted numerous times the full text of the laws.