Henderson Case Trimmer Reviewed — Fast and VERY Repeatable

Our friend and colleague F-Class John tests some of the finest reloading and shooting equipment you can buy. Recently he added the impressive Henderson Gen 3 Powered Trimmer to his inventory of tools. John is now a Henderson fan. He likes the speed, precision, and repeatability of the $779.00 Henderson machine, which trims-to-length and chamfers the case mouth all in one pass. Unlike some other trimming tools, the Henderson indexes off the overall case length NOT the shoulder. John found this worked just fine for his .284 Winchester brass, which has all been full-length sized prior to trimming.

John liked the precision of the Henderson trimmer and the overall design of the machine, which offers good ergonomics and very precise alignment of the cases. Cycling is smooth and positive, as you can see from the videos. Fit over the pilot was fine for John’s .284 Win brass, but he notes that other users may need to expand their case necks appropriately to fit their pilot.

Watch the video to see the Henderson trimmer in action. The dual, parallel horizontal support shafts provide precise alignment of the case as it moves inward toward the cutter blade. The Taper-Lock cutter provides a 14-degree inside chamfer and 30-degree outside chamfer. The trimming process is very consistent case after case, and the Henderson’s design captures brass shavings effectively.

Testing Trim Length Consistency — Henderson Shows Superb Repeatability
John did a separate quick test to demonstrate the trim length consistency of the Henderson unit. Measuring with digital calipers, John found that he could easily hold case overall trim lengths within .001″ (one-thousandth). The consistency was excellent even when trimming cases very quickly. When trimming .003″ off his cases, John said the Henderson showed superb repeatability. Henderson promises the trimmer “will repeat to within 0.002″ with same brand brass”, and John was able to hold 0.001″ length consistency.

Another Henderson owner posted: “I love mine. I like [the] consistent trim length with the positive stop. [Doing] the trim, chamfer, and debur all in one step sure makes the process nice and easy! I also immediately noticed the problem with the pilot on the cutting head with my sized cases. I just polished the pilots on my cutting heads with some fine grit sand paper a little at a time till I got it perfect for my preferred neck tension setting! I’m very pleased with my purchase of the Henderson precision trimmer.”

Henderson Power Trimmer vs. Giraud Power Trimmer

After he tested his new Henderson trimmer, F-Class John compared the pros and cons of the Henderson vs. his other high-volume power trimmer, a Giraud. He likes both machines, but now favors the Henderson for trimming his .284 Winchester match brass. He found that his ES/SD dropped a bit for brass trimmed with the Henderson vs. brass trimmed with the Giraud. With the Henderson-trimmed brass, John achieved an ES of 15 fps for 49 shots. That’s mighty impressive (see photo at right).

But the Giraud does have it’s advantages. It can work with calibers above .338, and it is very fast. One viewer of this video commented: “The Giraud is insanely fast if you aren’t only loading insane precision ammo. I borrowed one when I first started reloading and immediately ordered one. I’ve trimmed somewhere between 40-50k .223 cases. You can just rip through them while watching TV or listening to a podcast. It trims to length consistently less than +/-.001 all day.” The Giraud also indexes off the shoulder while the Henderson trims based on Cartridge Overall Length (OAL).

Henderson Gen 3 Trimmer Details

The Henderson Trimmer is available from HendersonPrecision.com for $779.00. When ordering, you must select a caliber and a collet size. Expect to wait a bit for delivery, depending on the cartridge type(s) you load. Available calibers are: .223, .243 (6mm), .25, .264 (6.5mm), .277, .284 (7mm), .308, and .338.

Product Description: The Gen 3 powered case trimmer uses a powerful, single-speed DC motor. The DC motor is extremely smooth and quiet and powers the spindle at around 1700 rpm. The enclosed aluminum motor mount shroud bolts directly to the bearing housing. The 90-volt DC motor offers maximum torque at 1700 rpm where you need it most. The motor has an in-line on/off switch for easy control. The Tri-Trim case trimmer includes one Henderson Precision Taper-Lock cutting head with Forster pilots as well as one Forster collet. The Taper-Lock cutter provides a 14 degree inside chamfer and 30 degree outside chamfer. The following cutter heads are available: 224, 243, 25, 264, 277, 284, 308, 338.