For most 200 gr SWC, .470" taper crimp and 1.25" OAL has been the match standard for many and you can use these dimensions as reference.
Depending on the pistol/barrel used, some modifications are needed on the round, but for most pistols, .470"/1.25" should work.
SAAMI max for taper crimp is .473" and 1.275" OAL for RN bullet. Although tighter 1911/match barrels (I used Wilson Combat barrel in my match 1911) require less taper crimp than SAAMI max, my M&P45 feeds/chambers .472" taper crimped 200 gr SWC loaded to 1.27" without any issues.
For greater accuracy from bearing surface of the bullet engaging the rifling sooner, I load 200 gr SWC as long as it will reliably feed and chamber.
