GUNSMITHING AND TOOL MAKING BIBLE

DIMENSIONS FOR THE STARTER BUSHING HOLE

Caliber Drill Diameter

172 .164

224 .212

244 .228

257 .244

264 .250

270 .264

284 .270

308 .293

303 .297

323 .304

338 .322

350 .343

375 .360

44 .415

457. 443