I've got a couple of shots here in my APUG gallery that were shot with Rollei IR 400 film and an R72 filter. Here is an example:
In my case, I used a Mamiya TLR and a hand meter. One of my successes was metered at EI 3, while another was metered at EI 12.
It is of course difficult to determine how much IR is included in the light being measured by the meter, but it definitely does change as the light changes, so a suggested standard exposure isn't likely to work consistently - bracket instead.