MCR Reamer List

Montour County Rifles


Reamer List Updated 9-10-19


Throat length is measured from case mouth at maximum length to intersection point of free bore and 1.5 degree lead angle






20 caliber


.20 Tactical / .233 neck / .096 throat length

.20 Tactical / .226 neck / .046 throat length

.20 Practical / .233 neck / .046 throat length

.204 Ruger / .232 neck / .110 throat length





.22 caliber


.22-250 / .255 neck / .078 throat length

.22-250 / .250 neck / .026 throat length

.22-250 Ackley / .254 neck / .075 throat length

.22-250 Ackley / .250 neck / .060 throat length

.222 Remington / .254 neck / .040 throat length

.221 Fireball / .254 neck / .035 throat length

.22 Hornet / .245 neck / .025 throat length

.22 Long Rifle

 22-243 Winchester / .258 neck / .095 throat length

.223 Remington Match / .251 neck / .078 throat length

.223 Remington / .254 neck / .040 throat length

.223 WSSM / .253 neck / .035 throat length

.22 Creedmoor / .257 neck / .040 throat length

.22 cal. 1.5 degree uni-throater





.243 caliber / 6mm


6mm Dasher / .2704 neck / .125 throat length

6mm - .284 / .272 neck / .095 throat length

6mm x 47 Lapua / .271 neck / .120 throat length

6mm BR / .269 neck / .125 throat length

6mm BR / .2704 neck / .110 throat length

6mm BR / .262 neck / .120 throat length

6mm Remington / .277 neck / .110 throat length

6mm Remington Ackley / .276 neck / .075 throat length

6mm WSSM / .272 neck / .070 throat length

6mm - .250 / .274 neck / .050 throat length

6mm - 06 Ackley Imp. / .277 neck / .035 throat length

6mm Hart / McCrea / .281 neck / .175 throat length

.243 Winchester / .277 neck / .035 throat length

.243 Winchester Ackley / .278 neck / .035 throat length

6 x 45 / .271 neck / .095 throat length

6mm Competition Match / .274 neck / .113 throat length

6mm Competition Match / .271 neck / .110 throat length

6mm Competition Match / resize reamer

6 XC / .276 neck / .100 throat length

6mm Creedmore / .275 neck / .135 throat length

6mm 1.5 degree uni-throater






.25 caliber


.25 - 06 / .288 neck / .030 throat length

.25 - 06 Ackley / .289 neck / .120 throat length

.25 - .284 / .292 neck / .035 throat length

.257 Weatherby Mag / .289 neck / .380 throat length

.257 Roberts Ackley Imp. / .289 neck / .065 throat length


.250 - 3000 Savage / .287 neck / .025 throat length

.257 cal. 1.5 degree uni-throater





.264 caliber / 6.5mm


260 Remington / .298 neck / .120 throat length

260 Remington Ackley Imp. / .298 neck / .100 throat length

264 Winchester Mag / .297 neck / .225 throat length

6.5 x 47 Lapua / .294 neck / .155 throat length

6.5 - .284 Norma / .295 neck / .220 throat length 

6.5 - .284 Norma / .291 neck / .210 throat length

6.5 - 300 Weatherby / .296 neck / .215 throat length

6.5 - 300 Weatherby Mag. Ackley Imp. / .295 neck / .110 throat length

6.5 - 300 WSM / .299 neck / .035 throat length

6.5-06 / .296 neck / .220 throat length

6.5-06 Ackley Imp. / .296 neck / .220 throat length

6.5 Creedmore / .296 neck / .205 throat length

6.5 Super LRS / .296 neck / .080 throat length

6.5 SAUM  .296 neck / .085 throat length

6.5 x 55 Ackley Imp. / .291 neck / .105 throat length

6.5 PRC / .297 neck / .205 throat length

6.5 Grendel / .295 neck / .105 throat length 

6.5mm 1.5 degree uni-throater





.270 caliber


.270 Winchester / .310 neck / .035 throat length

270 WSM / .310 neck / .191 throat length





.284 caliber / 7mm


7mm - 08 / .316 neck / .110 throat length

7mm Dakota / .316 neck / .180 throat length

7mm WSM / .312 neck / .220 throat length

7mm WSM / .320 neck / .050 throat length

7mm STW Rougher / .308 neck

7mm STW .311 neck / .140 throat length

7mm STW .319 neck / .210 throat length

7mm Remington Ultra Mag Imp. / .323 neck / .250 throat length

7mm Remington Mag / .316 neck / .135 throat length

7mm Fielding Mag / .310 neck / .410 throat length

7mm Fielding Mag / Resize Reamer

7mm SAUM / .321 neck / .100 throat length

7mm Practical / .317 neck / .145 throat length

.284 Winchester Rougher 

.284 Winchester / .322 neck / .050 throat length

.284 Winchester / .317 neck / .155 throat length

280 Remington / .316 neck / .030 throat length

280 Remington Ackley Imp. / .314 neck / .055 throat length


28 Nosler / .321 neck / .235 throat length

28 Nosler / .314 neck / .245 throat length

7mm Reaper / .312 neck / .265 throat length

7mm LRM / .321 neck / .143 throat length

7mm 1.5 degree uni-throater




.30 caliber


30 - 338 Winchester Mag / .341 neck / .120 throat length

30 - 06 / .341 neck / .025 throat length

30 - 06 Ackley Imp. / .341 neck / .025 throat length

30-06 Serengeti / .340 neck / .120 throat length

30 - 378 Weatherby / .335 neck / .120 throat length

30 - 378 Weatherby Ackley Imp. / .336 neck / .385 throat length

300 Weatherby Mag / .338 neck / .000 throat length

300 Weatherby Mag Ackley Imp. / .338 neck / .110 throat length

30 - 338 LKR ( customer designed 30-338 Lapua Imp.) / .336 neck / .345 throat length

300 WSM / .345 neck / .035 throat length

300 WSM Match / .341 neck / .070 throat length

300 Winchester Mag / .335 neck / .025 throat length

300 Winchester Mag / .342 neck / .025 throat length

300 Winchester Mag Tactical Match / .341 neck / .095 throat length

300 Remington Ultra Mag / .345 neck / .120 throat length

300 Remington Ultra Mag / .341 neck / .025 throat length

308 Baer / .335 neck / .030 throat length


30-338 Lapua Imp. 35* shoulder / .333 neck / .275 throat length

300 SAUM / .345 neck / .125 throat length

308 Winchester / .345 neck / .095 throat length

308 Winchester Match / .345 neck / .115 throat length

30 Nosler / .341 neck / .145 throat length

300 Norma Mag. / .343 neck / .230 throat length

30 cal neck and throat reamer / .342 neck / .095 throat length

.308 cal. 1.5 degree uni-throater





35 caliber


35 Whelen / .389 neck / .145 throat length





338 caliber


338-06 A-Square / .372 neck / .195 throat length

338 Winchester Mag / .371 neck / .020 throat length

338 - 378 Weatherby / .369 neck / .045 throat length

338 Remington Ultra Mag / .372 neck / .125 throat length

338 EDGE / .371 neck / .120 throat length




338 Lapua Mag / .373 neck / .150 throat length

338 Lapua Mag / .373 neck / .020 throat length

338 Lapua Imp. 40* / .374 neck / .150 throat length

338 Norma Mag / .371 neck / .240 throat length

338-300 WSM / .374 neck / .030 throat length

338-408 Chey-Tac Imp. 35* / .372 neck / .220 throat length

338 - 408 Chey-Tac / .372 neck / .230 throat length

340 Weatherby Mag / .369 neck / .356 throat length

33 Nosler / .371 neck / .125 throat length

.338 cal. 1.5 degree uni-throater





375 Caliber


375 Ultra Mag / .406 neck / .180 throat length





45 Caliber


45 Raptor / .110 throat length

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