Fifty Caliber Tools
State of the art 50 BMG bullets are being built on Corbin swaging and reloading presses as you read this. For more than 25 years, Corbin has provided benchrest quality 50 caliber tools for bullet making and reloading, not only for military and security services of the U.S. government, but for our allies and civilian gunmakers and shooters. Research projectiles built on Corbin equipment during the Viet Nam war simulated Russian and Chinese anti-tank and heavy machine gun projectiles to help companies such as DuPont Chemical Textile Division develop light-weight armour for our helicopters. If you're just now reading about Corbin's 50 caliber equipment for the first time, it's probably because we've been too busy supplying our long-time clients to advertise the fact.
As with the entire spectrum of calibers from .104 to 1-inch Gatling, from airgun pellets to shotgun slugs, from paper-patch rifle to cowboy action, from winning benchrest championships to arming air marshals, Corbin continues a legacy of over four decades leadership in custom bullet-making tools and design.
(For more information/pricing, click the photo of each item shown below)
CSP-2 Mega-Mite Press
For both reloading and bullet swaging, the Corbin Mega-Mite press is a high precision press with Torrington needle bearing links and a hardened and ground alloy steel ram with three
different stroke lengths from 2 to 6 inches of ram travel. The press head is threaded for 1-1/2 by 12 thread per inch, and the ram is threaded for 1-inch by 12 tpi.
The press comes with a ram extension/adapter with 7/8-14 threads, and a conventional RCBS T-slot adapter for your other calibers. An optional screw-in 50 BMG shell holder can be added, which fits directly into the adapter. Or, get the optional primer tool which comes with the shell holder, and can be used in the same setting both to knock out the old primer and to install the new one.
The Mega-Mite press (CSP-2) can be mounted directly to your bench top, or you can get it with the optional self-supporting floor stand (no need to mount the stand, as your own body weight standing on the attached deck holds it in place while operating the press). When purchased with the press, a discount applies to the stand.
To see more options, technical specifications, and construction details, click on the image.
Priming Tool PT-50
The Corbin 50-cal. priming tool (PT-50) is unique in using the CSP-2 press to apply precise, delicately adjustable priming power. Depending on the setting you choose, you can select seating by "feel" or by absolute position control. The same tool can be kept in place while the empty fired case is deprimed! The priming rod retracts as the ram is raised, opening a spent primer port in the tool base. Your depriming/sizing die in the press head then pushes the spent primer out, and it drops through the shell holder, through the port in the tool, and out the side. When the ram is lowered, the a new primer can be pushed into the primer pocket without changing any adjustments...just slide the case out, clean the pocket, drop a new primer into the top of the holder, slip the case back in and lower the ram to push the new primer into the waiting case.
The PT-50 comes with a SH-50 shell holder, which you can use in the tool with the priming punch removed, for other reloading tasks. Corbin's shell holder is made from alloy steel, hardened and ground, with the precision you expect from the world's leading benchrest die-makers. The high strength steel alloy allows for a thinner than usual top section, which in turn permits the case to be sized further toward the head than with most conventional shell holders, helping to prevent jams.
SH-50 Shell Holder
The Corbin SH-50 shell holder is made from alloy steel, hardened and ground, with a thin top that allows you to size more of the case head. It is threaded 7/8-14 tpi, and screws directly into the Corbin reloading adapter bushing or the similar PT-50 priming tool base. Certain other large reloading presses, such as the Rockcrusher by Old Western Scrounger, have used 7/8-14 threads for their rams, which would accept this shell holder directly.
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The Corbin Hydro-Press(tm) is the world's most popular and powerful bullet swaging and reloading press for custom bullet makers. It builds bullets as large as 1-inch diameter with ease. Another reason to consider the CHP-1 is the controlled repeatability and future expansion interfaces built into this top of the line model, which can draw jackets from tubing or strip metal, operate the JMK-2-H auto
strip feed jacket making head, extrude lead wire, reload ammunition, and perform other feats that need both power and precision control.
The CHP-1 uses electronic position sensing for the top of stroke, bottom of stroke, and an intermediate loading position. It can be set to automatically run a complete cycle and then wait for you to pick up the finished bullet and insert more components, with pressure and dwell time controlled by the press. Three pressure transducers, three non-contact electronic position transducers, and top panel precision timing (with dwell time in milliseconds and seconds) give you more control over critical stages in the operation.
The press provides built-in interfaces for operation and control of conveyer belts, jacket strip uncoiling machines, and other accessories that you may want in the future for making your own drawn jackets. It can be equipped with the JMK-2-H semi-automatic strip jacket drawing system, which feeds up to 150 pound pancake coils of jacket material into the press, automatically lubricating the strip, cutting a disk from it, and drawing the disk into a cup without operator intervention. A conveyer carries the cup into a bin for storage until it is processed further, while the scrap "web" of strip is cut into pieces and dropped into a recycle bin. A key lock switch prevents unauthorized persons from running the Hydro-Press, which can be locked in manual mode to prevent changeover to automatic operation.
50 BMG Reloading Die Set
Corbin offers 50 BMG reloading die sets with 1-1/2 inch x 12 tpi threads, which fit directly into the CSP-2 and CHP-1 press heads without the use of adapters. These are standard 2-die sets, for depriming, sizing, and seating the bullet. Custom bullet seating punches can be
provided to exactly match the ogive of a given bullet, if desired.
CTJM-1-H Jacket Maker
The CTJM-1-H Copper Tubing Jacket Maker set lets you make high quality .50 caliber bullet jackets from 1/2-inch copper tubing. The best tubing is usually refrigeration or steam line tubing, rather than common water tubing, although the standard tubing available in hardware stores can be used.
Copper tubing is first cut to desired length (bullet length plus about a quarter inch to make the bullet base). One end needs to be burr-free but the other can have a burr or roll-in edge. The burr-free end is slipped over a precision honed steel punch, and pushed into the jacket making or end rounding die. The die rolls the end over at an angle, nearly closing it. If the tubing is larger than the caliber (.511 typically) it must be pushed through a reducing die, but typically 1/2-inch tubing is sufficiently under final diameter to work without a draw die. The end-rounded tube is annealed (heated to about 1200-degrees briefly), allowed to cool, and then pushed into your regular core seating die using a special end-flattening punch (or into your BT-1 die if you are making a rebated boattail bullet).
The end flattening punch has a shoulder which must push the edge of the jacket, so the length of the punch tip must be matched to the jacket (the jacket is longer by the amount that is to become the base). In order to make various lengths of jackets, either several different length end-rounding punches must be ordered, or a single adjustable length punch can be ordered instead. The adjustable length punch lets you set the tip length for any reasonable jacket length. It is cost effective when you plan to make three or more lengths.
PCM-2 Power Cannelure Tool
Cannelure grooves can be rolled on .50 BMG bullets by using the PCM-2 power cannelure machine. The PCM-2 can handle up to 50 bullets per minute, applying a precision factory-like serrated cannelure groove at the exact position and depth you choose.
With other optional components, the PCM-2 can handle calibers from 224 to 1-inch Gatling. It is powered by a field-convertible 115/230v 50/60hz motor, which drives an oil-filled transmission and utilized forced air cooling for continuous operation.
With optional cartridge feeding accessories, the PCM-2 can also roll precise cannelures on cartridge cases, so that the bullet won't push back into the case during feeding in auto-loaders. These custom built PCM-2 adaptations have been successfully applied to cartriges as diverse as 9mm and 45-70 WCF.
The PCM-2 comes with a hardened cannelure wheel with standard .050-wide knurled pattern, but custom wheels to roll any shape or style of groove can be ordered, including multiple grooves, crimping grooves with one sloped side and one right-angle side, radiused grooves, and different depths of grooves. The depth and position are precisely adjustable. With proper cannelure wheels, the PCM-2 can handle from 224 to 1-inch projectiles (224 to 458 is covered by standard size wheels; larger calibers also require a special backing plate).
A very useful accessory, specific to each caliber of bullet, is the PCM-F carousel feeder. This is a support device that slips over the drive shaft of the PCM-2 machine, with hardened steel support pins spaced exactly for the caliber of bullet to fit between them. Long bullets or boattailed bullets don't stand vertically on their bases securely, and will tend to tip over when fed into the cannelure machine. The feeder "wheel" prevents this. It instantly stops with light finger pressure, allowing you to insert a bullet quickly. Then the embossing force rotates both the bullet and drives the support wheel around to produce a perfectly cannelured bullet. (You cannot
stop the feeder wheel while a bullet is being cannelured, but as soon as the bullet is finished, the wheel is again free to be stopped with a light touch for loading another bullet.
CBP-50 Corbin Bullet Puller
Smoothly, safely remove bullets from loaded rounds without marking or distortion, using the power of the reloading press. No sharp spring-loaded fingers to marr the bullet, no jarring impact to break up the powder grains or crack the primer pellet (or ignite a pyrotechnic, tracer, incendiary, or explosive payload). Combines the speed of a commercial spring loaded puller with the clean, marr-free grip of a collet pullet without the slowness of screw tightening and unfastening on every round. Also available for other calibers from 0.10 to 20mm on special order. See prices at PRICES.HTM.