I trimmed all cases to 2.044"
I used Sierra 80 gr Blitz bullets.
With a completely cleaned rifle, I took one of those, lubed it and put it in an unsized unprimed case then chambered it slowly in the rifle letting the rifling press the bullet down into the case. Slowly cycling the bolt extracting that round, I measured the overall length. Sometimes this method can leave the bullet stuck in the throat of the rifling. A standard cleaning rod and a wooden mallet has always dislodged the bullet for me. If this happens, when you put the cleaning rod in from the muzzle, poke it around and get a feel for it settling on the tip of the bullet. You don't want it between the bullet and the barrel when you start tapping with the mallet. I did this with 3 rounds. I set my seating die to seat .001 shorter than the length out of the rifle. I loaded 10 of those. The next batch I seated .002 shorter, the next batch I loaded .003 shorter. Accuracy got better as the OAL got shorter. I stopped at .003 Apparently my model seven likes that spacing.
I worked up to a powder charge of 39.4gr of 4350. Maximum is around 41.5gr. I never load to maximum.
It is loud but has very little recoil and is dead on accurate. It is not very dirty either. Cleanup was easy. It has obliterated several groundhogs so far and a marauding coyote.
I am now working up a load using the Sierra 100gr SBT, following the same method as above. Hopefully the results will be as successful.