Using the Partition, I found same/similar velocities with both 62 and 63 grains topping out both the velocity and case volume but it's an honest 2700fps load with a 22" barrel in my Model 70 Featherweight,
I'd be ecstatic to get 2700 out of my M70 !
Using the Forster long funnel, I have no doubt I could fit it in there, but I'll start low and see where the gun wants to be - 2500fps would be just fine and well away from pressure if the groups are there.
Thanks.