forster trimmer power case User Guide
Select the correct collet for the case to be trimmed (see the table on the back) and place it in
the collet screw. For a smooth operation, a very small amount of grease should be applied to
the front face and tapered portion of the collet before installing it in the collet screw. Turn the
collet screw containing the collet into the collet housing by hand until the collet touches the
housing without closing. Fasten this assembly to the base post with the 10-32 x 3/4” socket
To line up your trimmer with the drill press spindle, place one end of the line-up bar in the
collet and lock it. The upper end of the line-up bar is then placed in the drill press chuck and
locked. The Power Case Trimmer is now accurately lined up and ready to be fastened to the
The hole in the base has a 3/8”-16 thread for attaching the base to drill press tables that have
a hole in the center. On drill presses without a center hole, the base can be fastened to a flat,
hardwood board and the board then held by C-Clamps. Either of these methods has proven
Install the correct Pilot in the cutter holding it tightly against the edges of the cutter. With ten
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sion on the collet released, insert the base of the cartridge case into the collet. Hold the car
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tridge case against the shoulder of the collet with one hand and lock the collet with the other.
It is important that the base of the cartridge is firmly seated against the shoulder of the collet
The drill press spindle stop controls the depth of cut and should be set carefully in order to
trim the cases to proper length. Take a light trial cut and measure the length of the case. Sharp
Powder residue can be removed from the primer pocket with the Forster Primer Pocket
Cleaner and Center. The Primer Pocket Cleaner is locked in the cutter in place of the Pilot. The
Center is locked in the collet. With the neck of the case over the Center, support the case with
one hand and guide the Cleaner into the primer pocket. A few revolutions will then remove
Primer pockets can be chamfered with the Forster Primer Pocket Chamfering Tool. This tool
will also remove most of the crimp from military cartridges. Use the same center that is used
All calibers can be hollowpointed with the Forster Universal Hollow Pointer Accessory, which
after the cases have been fired with a full load and before
The Forster Neck Reamer is mounted in the cutter shaft
in place of the Pilot. Reamers are ground .002”-.003” larger than the maximum bullet diameter.
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Page 1
FORSTER POWER CASE TRIMMER INSTRUCTIONS
head cap screw. Screw the threaded handle into the collet screw.
drill press table.
satisfactory in use.
in order to obtain consistent and accurate results.
corners are easily removed by using the Forster Inside-Outside Deburring Tool.
powder residue.
for the Primer Pocket Cleaner.
is made for all rifle and pistol cartridges in 1/16” or 1/8” size drills.
Neck reaming should be done
the neck or full length sizing operation.
The staggered-tooth, high-alloy steel
shaft cuts smoother and more evenly.
Our staggered design prevents the cut
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ter from dropping into dings or low spots
on your case mouth. The exclusive
staggered-tooth design trues up and
Our Brown & Sharpe-style collets
allow the ability to trim cases to extreme
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ly consistent case lengths. Forster
Collets close on the rim of the case with
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out pulling the case back. This feature
ensures that your cases are trimmed to
identical lengths even when there are
If the cutter shaft becomes dull after sev
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eral thousand cases, it may be resharp
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To find which case trimmer parts,
including Collets and Pilots are right for
you, visit our online search database at
www.forsterproducts.com (Click on the
“Parts Search” button in the top right
Page 2
ORDERING CHART FOR POWER TRIMMER
(Drill Press Chuck)
Trim Neck Neck
17 Rem. (requires 17 cal. cutter shaft).............................................. .171” CT1017 CT2001 NR1017 .1730”
CARTRIDGES Diameter Order # Order # Order # Diameter
22 Hornet, 22 K Hornet - If .224” bullet is reloaded, see next line.... .223” CT102- 2 or 3 NR1223 .2255”
222 Rem., 222 Rem. Mag., 22 Varm., 223 Rem., 225 Win. ............ .224” CT1022 CT2001 NR1224 .2265”
22 250, 220 Swift, 221 Fireball, 22 PPC, 22 B.R. Rem., 5.6 x 50R .224” CT1022 CT2001 NR1224 .2265”
218 Bee & Mashburn, 219 Zipper and Wasp, 22 Sav., 22-30-30..... .224” CT1022 CT2002 NR1224 .2265”
228 Krag, 22 Jet C.F. Magnum, 224 Varm. Weatherby, 22 PPC...... .224” CT1022 CT2003 NR1224 .2265”
243 Win., 6mm, 6mm mag & Belted Exp., 244 Rem. ...................... .243” CT1024 CT2001 NR1243 .2455”
6mm B.R. Rem., 6mm PPC.............................................................. .243” CT1024 CT2003 NR1243 .2455”
6mm Krag and 6mm Krag Long....................................................... .243” CT1024 CT2003 NR1243 .2455”
257, 250 Sav. & Ackley, 250-3000, 25 Souper, 25-06...................... .257” CT1025 CT2001 NR1257 .2595”
25-20 Repeater, 25-35, 25 Rem. ..................................................... .257” CT1025 CT2002 NR1257 .2595”
25 Krag Imp., 256 Win. .................................................................... .257” CT1025 CT2003 NR1257 .2595”
6.5 x 57 Mau., 6.5mm Win., 6.5 Jap. Mau., 6.5 x 55 Swede & SKAN .264” CT1026 CT2001 NR1263 .2665”
6.5 x 257 Jap., 256 Newton, 260 A.A.R., 264 Win. Mag. ................ .264” CT1026 CT2001 NR1263 .2665”
270 Win., Sav., Gibbs, Weatherby & Ackley, 257 H & H.................. .277” CT1027 CT2001 NR1277 .2795”
7mm, 7 x 57 Mau., 7mm Weatherby, 7 x 64, 276, 7mm-08, 7mm TCU .284” CT1028 CT2001 NR1284 .2865”
280 Rem., 284 Win., 7mm Rem. Mag., 7mm B.R. Rem. ................. .284” CT1028 CT2001 NR1284 .2865”
30-06, 308 Win., 300 Mag., 7.62 NATO, 300 Savage....................... .308” CT1030 CT2001 NR1308 .3110”
30-30, 30 Rem., 30 WCF, 303 Savage, 7.5 x 55 Swiss.................... .308” CT1030 CT2002 NR1308 .3110”
30-40 Krag, 30 Carbine, 30-40 Imp., 7.62 x 39................................ .308” CT1030 CT2003 NR1308 .3110”
303 British, 32 S&W Long, 7.65 Mau., 7.7mm Jap. ......................... .311” CT1031 CT2001 NR1311 .3135”
32-20................................................................................................. .311” CT1031 CT2002 NR1311 .3135”
8 x 57, JS & RS, 8 x 60, 7.92 x 57, 8mm-06, 8mm Mauser............. .323” CT1032 CT2001 NR1323 .3255”
32 Win. Spec., 32 Rem., 32-40......................................................... .323” CT1032 CT2002 NR1323 .3255”
333 Win., 333 OKH, 33 Ackley.......................................................... .333” CT1033 CT2001 — —
33 Win. ............................................................................................. .338” CT103- *CT2004 — —
338 Win., 338 Win. Mag., 338 Gibbs, 340 Weatherby Mag. ........... .338” CT103- CT2001 NR1338 .3405”
348 Win. ........................................................................................... .348” CT1034 *CT2004 — —
35 Rem., 358 Win., 358 Norma Mag. ...................................... .357”, .358” CT1035 CT2001 NR1358 .3605”
38 Colt Super............................................................................ .357”, .358” CT1035 CT2002 NR1358 .3605”
38 Spec., 357 Magnum, 35 Win. ............................................. .357”, .358” CT1035 CT2003 NR1358 .3605”
9mm Luger (needs extra short base)....................................... .355”, .356” CT1351 CT2002 NR1355 .3575”
380 Auto (needs extra short base).................................................... .356” CT1351 CT2001 — —
9.3mm x 74 R, 9.3mm x 62............................................................... .365” CT1368 CT2001 — —
375 Mag., 375-06, 375 Barnes, Weatherby & Ackley, 375 H&H...... .375” CT1375 CT2001 NR1375 .3780”
38-50, 378 Weatherby....................................................................... .375” CT1375 *CT2004 NR1375 .3780”
375 Winchester.................................................................................. .376” CT1375 CT2002 NR1375 .3780”
41 Colt, 401 Win., 38-40, 395-400, 41 S&W..................................... .400” CT1400 CT2001 NR1400 .4025”
10mm Auto Pistol, 40 S&W............................................................... .400” CT1400 CT2003 NR1400 .4025”
41 Rem., Mag. .................................................................................. .410” CT1410 CT2002 NR1410 .4125”
416 Weatherby, 416 Rigby................................................................ .416” CT1416 *CT2004 — —
44 S&W Spec., 44 Rem. Mag., 44-40, 444 Marlin Mag. .................. .429” CT1432 CT2001 NR1432 .4340”
45 ACP, 45 Auto Rim., 45 Win. Magnum ......................................... .452” CT1452 CT2001 NR1452 .4545”
45-90.................................................................................................. .454” CT1452 *CT2004 — —
45 Long Colt........................................................... .452” (Pre WWII), 454” CT1455 1 or 2 — —
45-70................................................................................................. .457” CT1458 *CT2004 — —
450 Watts, 458 Win., 450 Ackley Mag. ............................................ .459” CT1458 CT2001 NR1458 .4605”
Bullet Pilot Collet Reamer Reamer
Cutter Shaft
#PCT400
Collet Housing
#013
Collet Screw
#015
FEATURES OF
THE POWER CASE TRIMMER
* #4 COLLET USAGE: Use of the #4 Collet requires that the Original Case Trimmer
Collet housing opening be enlarged to .610”. This will not affect the use of the 1, 2 or 3
collet. This can be opened at the factory upon request at no charge. NOTE — Return
only the housing. Do not send the entire Case Trimmer.
Ordering Collets and Pilots for cartridges not listed on the chart is
easy. To order the proper Collet, determine the cartridge diameter at
the rim of the case. Refer to the collet step dimensions below and
choose the Collet that will accept your cartridge rim. To order the
proper Pilot, determine the bullet diameter, find that diameter in the
chart above and find the corresponding Pilot in the adjacent column.
CASE TRIMMER COLLET STEP DIMENSIONS
Collet #1 (CT2001)
.379 .473 .532
Collet #2 (CT2002)
.350 .418 .506
Collet #3 (CT2003)
.356 .440 .545
Collet #4 (CT2004)
one step .605
Thank you for purchasing a Forster Precision Product. Please wear safety glasses.
Forster Catalogs are available upon request.
PT1010-001 Rev. 1
cuts perfectly square case mounts.
variations in your rim diameters.
ened at the factory for a nominal fee.
navigation tabs.)
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