Went to the range today. Tried the first of my heavy bullet loads. I had decided to start with AA1680, but couldn't find any kind of recorded starting loads.
I loaded a few, using the old tried and true WAG process. I started with 8.0gr, and loaded some with 9.0, and some with 10.0.
After loading those, I found an article by Paco Kelly, about loading the Hornet with cast. He used 680, and got great results at about 13.5 gr. This is probably where I'll get as this project goes on.
8.0gr with the 60gr bullet gave about 1500fps, but pretty erratic.
9.0gr averaged around 1750fps, and grouped slightly better.
10.0gr started showing some promise, at about 2000fps. A 5 shot group at 100yds was about 3". While this is certainly not great, it's a start. I think groups will (hopefully) get tighter as the load gets more consistent, which seems to be happening as I increase it.
The good news is that my Contender carbine stabilized the 60gr bullet perfectly, apparently. There were no oblong holes at any velocity.
the saga continues....