No magazine constraints, it's a single shot.
I generally always start by "kissing the lands", I do have one rifle, a browning, that seems to work better by jumping. I can't reach the lands with that one and stay in the mag. It is accurate jumping to the lands.
I need to do more work up those bullets, when I first tried them, I didn't get the accuracy I was seeking. I put the rifle aside and now I have time to get it ready.
I did load some of the Sierra's and will give them a try, they will be jumping. With the Sierra's touching, I get a COAL of 3.455, and I don't think I have enough base inside the case at that length.
I'm going to try jumping a few and see how it goes, if it doesn't do what I think it should, I'll consider sending it back. I did talk to the manufacturer and they told me to send it back. I want to make sure before I do. They also said they set that rifle up for 250's.