Re: Seating bullet depth
If I'm loading a new bullet for the first time, then I always do a little "discovery" to see if the magazine is going to limit the OAL or if it is the chamber/throat. So on the first one I load, I load it to the MAX OAL that I know the magazine will feed. Then chamber it to verify whether it is touching the rifling or not. If it is already touching the rifling, then I continue to seat progressively deeper until I reach the point that I can chamber it without shortening OAL.
I make note of this dimension to know to always stay under that value, otherwise you have the risk of sticking a bullet in the rifling and leaving it behind when unchambering the round. That can make a mess or blow up your rifle, depending on the next action you take (don't try chambering a second round behind it !!!)
The Savage centerfire magazines are very generous for cartridge length, much more so than AR type magazines, so often it is not the magazine that limits the OAL, but the chamber.
Depending on the bullet, optimum seating depth is usually from a few thou off to as much as 0.030" so knowing where contact occurs is a good starting point. I will find a good barrel/charge node first, then fine tune seating depth, then possibly fine tune load a bit more.