November 1st, 2016

Applied Ballistics Library Updates and November Seminar in NC

Applied Ballistics Custom Drag Models G1 G7 Nosler RDF

Nosler recently introduced a new series of high-BC bullets with factory-closed meplats. Bryan Litz’s team at Applied Ballistics is now testing these new Reduced Drag Factor (RDF) projectiles to determine their performance — and specifically to see if the BCs are as high as claimed. Nosler bullet testing is underway this week and Litz hopes to bring the results to the Applied Ballistics Seminar in North Carolina later this week (November 3-4, 2016).

Applied Ballistics Seminar Fall 2016: November 3 – 4, 2016 – Caraway Conference Center
4756 Caraway Mountain Road Sophia, NC 27350; Phone: (336) 629-2374. Seminar Sign-Up.

Bryan notes: “If you live in the Southeast region, this is the last seminar for you for at least a year, possibly longer. We will most likely do the next seminars in regions not yet visited.”

Applied Ballistics Library Update
Bryan Litz is hard at work testing new projectiles: “We are currently in the middle of testing all these new offerings that have recently come out. In fact, the lab is up and running today, with some of the new Nosler RDFs going down range. Bullet measurements have been taken with our state-of-the-art digital comparator which is accurate to within 0.0001″. For example, shown below are the measured dimensions for the new Nosler RDF .308 175 grain projectile. For these new bullets, we will not only have complete BC measurements accurate to ± 1%, but we will have Custom Drag Models (CDMs) coming as well.”

Applied Ballistics Custom Drag Models G1 G7 Nosler RDF

New Data Coming Soon
Bryan hopes to present the new Nosler data at the Seminar this week in North Carolina. In addition, Bryan is developing information for the Hornady ELD bullets, G9 Competition Series solid bullets, some new Sierras, and some other projectiles not currently in the library: “Once we complete testing on all these new offerings, we will then compile the library for the next library update (which will be done across all platforms). We want to make sure that none of these new offerings are left out. For those who want to see some of the early results, come join us at this final seminar of 2016!”

Custom Drag Models
Applied Ballistics has been providing custom drag models for use in trajectory prediction for the past several years. Custom Drag Models (CDMs) for bullets are a more refined way of modeling drag for bullets because you’re not referencing a standard like G1 or G7, rather you’re using the actual measured drag of a specific bullet in a ballistic solver. This results in more accurate trajectory predictions, especially through transonic.

Applied Ballistics Custom Drag Models G1 G7 Nosler RDF

Permalink Bullets, Brass, Ammo, News 2 Comments »
November 1st, 2016

Measure Your Chamber Length with Home-Made Modified Case

do it yourself chamber length gauge Sinclair case neck

We are sad to report that long-time Forum member Frank S. (aka fdShuster) passed away last year. Frank was a very knowledgeable shooter who was always willing to help others. Here is one of Frank’s smart inventions. He devised a way to measure the length of a rifle’s chamber using a fired cartridge case. This lets you find your MAX trim-to-length for any chamber. Frank’s system works by cutting a “collar” from part of the case neck. This then slips over a bullet seated in a case loaded without powder or primer. As you chamber the dummy round, the collar will move back to indicate the full length of the chamber. (Make sure the bullet is seated well off the lands so the dummy round can chamber fully.)

do it yourself chamber length gauge Sinclair case neck

do it yourself chamber length gauge Sinclair case neck

The pictured gauge can be home made (for free) with components you already have on hand. Frank explained: “I used a Dremel cut-off wheel to cut the front half of the case neck off. A jewelers needle file to de-burr both rough-cut edges. The cut-off surface does not need to be perfectly square, because you are using the original straight mouth to make contact at the front of the chamber. Seat any old bullet to the approximate normal seating length. Next apply a tiny drop of oil on the ogive of the bullet, and slide the ‘collar’ over the bullet. Then chamber the dummy round and close the bolt. Extract the round slowly and carefully and take the measurement with calipers (see top photo).”

Frank’s DIY chamber length gauge works well. In a related Forum thread, Frank posted: “I’ve compared length dimensions doing it this way and with the chamber length shown on my chambering reamer drawings, and the Sinclair gauge, and they are all within .001″ or so.”

do it yourself chamber length gauge Sinclair case neckCommercial Chamber Length Gauges May Not Work with Custom Chambers

Frank did use Sinclair chamber-length gauges for some applications. These bullet-shaped gauges slip into a cartridge, but “it’s inconvenient to order that little gauge only… without spending $6 shipping for a $7 item.” Moreover, the Sinclair gauges may not fit a custom chamber with a tighter neck dimension because the diameter of the ring at the end is too large.

As an alternative to commercial gauges, the collar-type, homemade gauge will function properly in a custom chamber. The homemade gauge will work with smaller-than-standard chamber neck dimensions, as long as you use a piece of appropriately-turned fired brass that fits your chamber.

Permalink Reloading, Tech Tip 4 Comments »
November 1st, 2016

Why All Gun Owners Should Vote in the Upcoming Election

NSSF gunvote election Supreme Court Second Amendment

The election is now just one week away. This is not just about who will become President. With Supreme Court appointments at stake, this election could have significant, long-term consequences for gun owners’ rights under the Second Amendment. We may be at an historic juncture in our nation’s history. If control of the U.S. House and Senate changes, and if anti-Second Amendment Supreme Court Justices are appointed, then things could change in very bad ways for the shooting sports. In the video below, National Shooting Sports Foundation President/CEO Steve Sanetti asks all gun owners to go to the polls armed with the facts. Exercise your right to vote. Remember, every vote counts.

Message from Steve Sanetti:

The lawful commerce in firearms and [your] rights … to enjoy the shooting sports are squarely at issue this year.

And this election is about far more than just the Presidential candidates. Control of both Houses of Congress, the Supreme Court, and all the important appointments and executive orders that the next President can make, are all at stake.

And your State and local elections can also affect your ability to enjoy your rights to manufacture, sell, own, and use firearms.

So please — don’t sit this one out. Your vote, and every vote, counts. Learn where all the candidates stand, talk to your family, your friends and your coworkers, and vote! This election is up to you, and America is counting on you!

Permalink News No Comments »