I can't find any loading data on it. However, Nosler has load data for their 130gr RDF.Finished 200 rounds 30-06 for my buddy's M1 Garand . Started 200 rds 30-30. Also looking for load recipe for 135 gr hornady a-tip running out of a 6.5 grendel
https://www.nosler.com/65-grendel clicking on the 130 tab.
I found one mention online of loading 135 A-tips in grendel, but I would NOT use that person's loading data (they don't give all of it) as they were loading it to 2500fps out of an AR-15. I cannot imagine that was safe pressures (it was not a 24" barrel), even with a slower powder, with a 135gr bullet. I would imagine safe velocities would be in the 2300fps range for most slower powders.
Anyway, I found that the Nosler 130gr RDF is 1.333" long, the 135gr A-Tip is 1.3886".
Best suggestion I would do is load it as long as it will possibly go to fit in the magazine without ramming in to the lands (bonus points if a bolt gun you are loading for) and then I would down rate the powder charges by 5% and make sure you are starting from the minimum load and slowly work up.
The load data is based on a 24" barrel. So assume around 150-200fps less with a 16".