Steve,
There are 2 or 3 makers of full length einstecklaufs that make (or made) them in calibers up to 9.3x74R. As a general rule though, they wouldn't install one larger than 6.5x57R in a drilling (the larger calibers could be installed in 0/Us). Exceptions to the general rule had to be approved on a case-by-case basis (depending on action type and condition). I am not sure if you can order one for installation by the shooter, or not. If sold to a German and delivered there, it would have to be proofed before delivery. If I were contemplating a full length einstecklauf for one of my drillings, I think I would choose 5.6x 50R, with the possible exception of 6.5x57R for my 6.5x57R drilling. The choice of caliber is a highly personal thing.
You might talk to George at T&G Gun Imports (www. German Gun Imports.com) about helping you find what you want.
It is nice to have you back, Steve.
Mike
