I sheepishly admit to make a mistake when setting up my COL. I checked good chambering. Fired rounds at the range with chambering each round individually. But in my haste to produce a good load for an upcoming hunt, I forgot to check that my rounds would cycle through the magazine. So, I have a great shooting single shoot in a Win70 XTR. Yeah, I know...don't worry, I'm trying to figure out a way to kick my own arss. 
Anyways, here is my load and what I propose to do since I have 30 rounds loaded and I'd like to not pull them all and start at the beginning (if I can avoid it).
First my load: 375 H&H - 300gr TSX - 63.0gr IMR4895
The COL with bullet touching the lands = 3.792"
The current single shot load COL = 3.717" (0.075" from lands)
The desired load to cycle thru COL = 3.550" (0.242" from lands).
Now, here are my questions:
1. does 0.242" from the lands not seem like a mile? I know Barnes like a bit of a jump to the lands, but isn't this 2 much?
2. rather than pulling bullets and charging with a lesser amount of powder and seating to 3.550", I was thinking of seating 5 bullets deeper in increments of 0.050" until I have 5 bullets with one at the desired depth. Of course I would observe each for signs of over pressure. Once and if the last one (3.550") shoots with no excess pressure, then I do one more but with a factory crimp. And then check if this last one shows signs of pressure. Everything being OK, I still have to then establish a grouping, but 3.550" is the max lenght I can use to cycle thru the action.
Do you fellows think this is a good approach or do you have better suggestions. Safety always being most important of course.

Anyways, here is my load and what I propose to do since I have 30 rounds loaded and I'd like to not pull them all and start at the beginning (if I can avoid it).
First my load: 375 H&H - 300gr TSX - 63.0gr IMR4895
The COL with bullet touching the lands = 3.792"
The current single shot load COL = 3.717" (0.075" from lands)
The desired load to cycle thru COL = 3.550" (0.242" from lands).
Now, here are my questions:
1. does 0.242" from the lands not seem like a mile? I know Barnes like a bit of a jump to the lands, but isn't this 2 much?
2. rather than pulling bullets and charging with a lesser amount of powder and seating to 3.550", I was thinking of seating 5 bullets deeper in increments of 0.050" until I have 5 bullets with one at the desired depth. Of course I would observe each for signs of over pressure. Once and if the last one (3.550") shoots with no excess pressure, then I do one more but with a factory crimp. And then check if this last one shows signs of pressure. Everything being OK, I still have to then establish a grouping, but 3.550" is the max lenght I can use to cycle thru the action.
Do you fellows think this is a good approach or do you have better suggestions. Safety always being most important of course.