January 13th, 2015

Using the Giraud Power Trimmer — Smart Video from Erik Cortina

Forum member Erik Cortina recently launched his own YouTube Channel dedicated to precision reloading and accurizing. Erik’s videos demonstrate the proper use of specialized reloading tools and provide helpful hints. Erik’s latest video is about the “mother of all brass trimmers”, the Giraud powered case trimmer. Erik says: “It you do volume reloading… this is the only trimmer to get. It not only trims to length but it also chamfers your case mouth inside and out.” In his video, Erik offers some very clever and useful tips that will help you get the most from your Giraud.

The Giraud trimmer is very precise. When set up correctly, it can trim brass with amazing consistency. In the video, Erik trims 5 pieces of brass in 15 seconds (6:32 mark). He then measures all five with precision calipers (7:00-8:08). All lengths are exact within .0005 (half a thousandth). Erik notes that the Giraud trimmer indexes off the case shoulder. As long as you have fire-formed brass with consistent base-to-shoulder dimensions, you should get very consistent trim lengths.

The secret to the system is a 3-way cutting head. This cutter can be swapped in and out in a couple minutes with wrenches provided with the kit. Erik has three different heads; one each for 6.5mm, 7mm, and .30 caliber. The video shows how to adjust the cutting heads to match caliber diameter (and to get the desired amount of inside/outside chamfer).

This is a manufacturer’s photo showing an older model.
Erik Cortina Meplat Giraud Case Trimmer YouTube Video Lapua

To trim and chamfer cases, you simply insert them nose-first into the cartridge-specific case-holder. Erick offers a smart tip — He uses a die locking ring to position the cartridge holder (3:15). This can be locked in place. Erik says die locking rings work much better than the hex-nuts provided by Giraud (with the hex-nut, one must re-set cut length each time you change case-holders.)

Erik Cortina Meplat Giraud Case Trimmer YouTube Video Lapua

The Giraud can be used in either horizontal or vertical modes. Erik prefers to have the trimmer aligned vertically, allowing him to push cases down on the trimmer head. But the trimming unit has twin sets of rubber feet, allowing horizontal or vertical orientation.

Erik Cortina Meplat Giraud Case Trimmer YouTube Video Lapua

Improved Case-Holder Made with Chamber Reamer:
For his .284 Shehane, Erik had to create his own case-holder (Giraud does not make one for that wildcat cartridge). Erik used his chamber reamer. To his surprise, Erik found that the brass was easier to trim in the custom case holder (compared to the Giraud-made spring-loaded holders). With a perfect fit, trimming and case extraction went more smoothly and the process was easier on his hands. (See 9:00-10:00). Based on Erik’s experience, you may want to create your own custom case-holder.

Trim Bullet Meplats Also
With a special bullet-holder fitting and meplat cutter head, the Giraud power trimmer can be used to trim bullet meplats. Trimming meplats can help make the Ballistic Coefficents of a batch of bullets more consistent. Uniforming meplats is also often done as a first step in the process of “tipping” bullets to improve BC.

Erik Cortina Meplat Giraud Case Trimmer YouTube Video Lapua

Giraud Power Trimmer

Permalink - Videos, Reloading, Tech Tip 8 Comments »
January 13th, 2015

Shades of SHOT — An Amazing 1911 Pistol Made from Wood

SHOT Show kicks off in exactly one week. What were some of the more unusual items unveiled at last year’s show? Well how about a convincingly authentic 1911-style pistol made entirely of wood. That’s right, every component — frame, barrel, slide, hammer, grips, trigger, even the functional beavertail grip safety — are made from wood. The gun shouldn’t be used with live, full-power ammunition of course, but otherwise it operates just like a real 1911. It will feed dummy rounds, the slide racks, and the trigger causes the hammer to fall — just like on a real 1911 made from metal. Somehow, we think John Moses Browning, father of the 1911, would have been proud….

Wood SHOT Show wooden 1911a1 1911 pistol nrablog

This unique all-wood pistol is a “tour de force” of craftsmanship. NRA Blog Editor Lars Dalseide was so impressed with the “all organic” wood 1911, that he named it as his favorite story subject for 2014:

#1 – A Fully Functional 1911 Pistol Made from Wood
When walking the SHOT Show floor last January I spotted what I thought was an incredible carving. But it was more than a carving – it was a fully functional 1911 pistol made out of wood.

From the Wood Caliber workshop in Davidson, Michigan, this beauty acts and feels just like a regular 1911. For the pure beauty of it, the 1911 wooden pistol is my top story for 2014.

Wood SHOT Show wooden 1911a1 1911 pistol nrablog

Permalink Handguns, News 4 Comments »
January 13th, 2015

Calculate Barrel Weight with FREE Software from Dan Lilja

Dan Lilja Rifle BarrelsAre you re-barreling a match rifle and need to know if you will still make weight? Or perhaps you want to select the right contour to hit an optimal carry weight for a new varmint rifle? Dan Lilja offers FREE software that will calculate barrel weight for straight contour, straight taper, and radius-tapered barrels. Dan’s software even calculates how fluting alters barrel weight.

For general info on barrel weight calculation for straight and straight tapers, read this article on Lilja’s website. Click HERE for another article explaining weight calculation with barrels that have a radiused (curved) contour section.

Here are the free software programs offered by Dan Lilja. Right click and “Save As”:

Straight Contour (.exe file) | Straight Contour (Excel file) | Contoured Barrels with Radius (Excel file)

Dan Lilja Barrel Contour diagram

Permalink Gunsmithing, Tech Tip 2 Comments »