The light taper crimp is to remove the flare from the expander die. The brass should lie flat against a jacketed bullet. If you simply loaded the new brass without flaring it first in an expander die, you should be fine. If you did flare it, then adjust the crimp to remove the flare. Technically, your calipers should show the case mouth anywhere between .467" and .473" diameter over top of the bullet in the finished cartridge.
The 3.5 grain BE load is typical of a light load for a wad gun, which is a gun modified with lightened springs for target shooting. It will fire, but may not properly cycle in your gun if you have standard springs. So you may have to chamber them manually working the slide.
The highest load you mention is 5.9 grains of #2, which is 0.1 grains above Accurate's own data, but they use a 1.225" COL. As the COL gets shorter, pressure goes up. You will still be under +P load territory with th 5.9 grain load, even at their COL, so it doesn't sound out of line for the 200 grain bullet.
Your statement about the seating depth has me confused. 1.275" is normal for round nose bullets with elliptical nose profiles like military hardball. All stubbier shapes seat shorter. Hornady's manual says the 200 grain XTP is designed to be seated to 1.230" COL. If you are still worried about pressure, don't seat it quite that short. 1.240" will still have enough grip on the bullet and will run your 5.9 grain loads of #2 a little lower. I would seat all the others to 1.230".
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