Chamber Dimensions in my 1911

First of all, thanks to all who take the time to offer their experiences on this forum for those of us newbies. Very helpful!
I am shooting a newer to me pistol with the following chamber dimensions (I am a Long Range rifle guy so bear with me):
From hood to end of chamber measures .904". Using new Starline brass .893" long. The recipe given to me by a long time Guard shooter is to seat a Zero 185 SWCHP so that about .035" remains outside the case. When seated as such the cartridge (after crimping) just seats flush with the hood. I have some Federal Match 185s where they slip beyond the hood about .040" but shoot very well. What is the goal? Allowing the bullet to soft seat into the lands or jump a bit into the lands?
Hope this makes sense,
Mike

About .030 of the shoulder out of the case should be good for a swc.
The federal GM match is a bit shorter than most due to the bullet shape.
I’ve always been told even or slightly below the hood.

Oh good. I'm in there somewhere.