November 28th, 2020

Brownells Black Rifle Friday Specials (Through Monday 11/30)

black friday bargain brownells

Yes Brownells is running a big Black Friday/Cyber Monday promotion. The Brownells Black Rifle Friday Sale is underway now. While this is focused mostly on AR-related hardware, there are also reloading products on sale, magazines, optics, and much more. Note the selection CHANGES DAILY, so you’ll want to check back Sunday (11/29) and Monday (11/30). Discount pricing valid through 11:59 pm on 11/30/2020. Along with the price cuts, you can get FREE SHIPPING with Code VPR for orders over $250.00.

Here are six of the best deals we found today, 11/28/2020. There are literally thousands of other items that are discounted. CLICK HERE for ALL SALE ITEMS.

black friday .22 LR conversion kit black friday chargemaster rcbs
Vortex scope rings AR15 AR15 AR lower receiver
black friday brownells opticss black friday Brownells pistol magazines

Important Advice about Building Your Own Black Rifle
This video covers basic legal provisions regarding construction of an AR15 from components. The lower is considered the firearm by the ATF — this must ship to an FFL. The Upper can be shipped directly to the consumer, but there are laws regulating barrel length. In addition, some states have laws prohibiting AR-type rifles. You should always check with a local attorney to determine the applicable gun laws in your city, county, and state.

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November 28th, 2020

Changes in Humidity Can Alter Powder Burn Rates — IMPORTANT

Tech Tip Norma Powder gunpowder moisture temperature humidity

Most shooters realize that significant changes in temperature will alter how powders perform. That’s why you want to keep your loaded ammo out of the hot sun, and keep rounds out of a hot chamber until you’re ready to fire. But there are other factors to be considered — HUMIDITY for one. This article explains why and how humidity can affect powder burn rates and performance.

We’ve all heard the old adage: “Keep your powder dry”. Well, tests by Norma have demonstrated that even normal environmental differences in humidity can affect the way powders burn, at least over the long term. In the Norma Reloading Manual, Sven-Eric Johansson, head of ballistics at Nexplo/Bofors, presents a very important discussion of water vapor absorption by powder. Johansson demonstrates that the same powder will burn at different rates depending on water content.

Powders Leave the Factory with 0.5 to 1.0% Water Content
Johansson explains that, as manufactured, most powders contain 0.5 to 1% of water by weight. (The relative humidity is “equilibrated” at 40-50% during the manufacturing process to maintain this 0.5-1% moisture content). Importantly, Johansson notes that powder exposed to moist air for a long time will absorb water, causing it to burn at a slower rate. On the other hand, long-term storage in a very dry environment reduces powder moisture content, so the powder burns at a faster rate. In addition, Johansson found that single-base powders are MORE sensitive to relative humidity than are double-base powders (which contain nitroglycerine).

Tests Show Burn Rates Vary with Water Content
In his review of the Norma Manual, Fred Barker notes: “Johansson gives twelve (eye-opening) plots of the velocities and pressures obtained on firing several popular cartridges with dehydrated, normal and hydrated Norma powders (from #200 to MRP). He also gives results on loaded .30-06 and .38 Special cartridges stored for 663 to 683 days in relative humidities of 20% and 86%. So Johansson’s advice is to keep powders tightly capped in their factory containers, and to minimize their exposure to dry or humid air.”

Confirming Johansson’s findings that storage conditions can alter burn rates, Barker observes: “I have about 10 pounds of WWII 4831 powder that has been stored in dry (about 20% RH) Colorado air for more than 60 years. It now burns about like IMR 3031.”

What does this teach us? First, all powders start out with a small, but chemically important, amount of water content. Second, a powder’s water content can change over time, depending on where and how the powder is stored. Third, the water content of your powder DOES make a difference in how it burns, particularly for single-base powders. For example, over a period of time, a powder used (and then recapped) in the hot, dry Southwest will probably behave differently than the same powder used in the humid Southeast.

Reloaders are advised to keep these things in mind. If you want to maintain your powders’ “as manufactured” burn rate, it is wise to head Johannson’s recommendation to keep your powders tightly capped when you’re not actually dispensing charges and avoid exposing your powder to very dry or very humid conditions. The Norma Reloading Manual is available from Amazon.com.

Real-World Example — “Dry” H4831sc Runs Hotter

Robert Whitley agrees that the burn rate of the powder varies with the humidity it absorbs. Robert writes: “I had an 8-lb. jug of H4831SC I kept in my detached garage (it can be humid there). 43.5-44.0 gr of this was superbly accurate with the 115 Bergers out of my 6mm Super X. I got tired of bringing it in and out of the garage to my house for reloading so I brought and kept the jug in my reloading room (a dehumidified room in my house) and after a few weeks I loaded up 43.5 gr, went to a match and it shot awful. I could not figure out what was going on until I put that load back over the chronograph and figured out it was going a good bit faster than before and the load was out of the “sweet spot” (42.5 – 43.0 gr was the max I could load and keep it accurate when it was stored in less humid air). I put the jug back in the garage for a few weeks and I now am back to loading 43.5 – 44.0 gr and it shoots great again. I have seen this with other powders too.”

If you have two jugs of the same powder, one kept in a room in your house and one somewhere else where it is drier or more humid, don’t expect the two jugs of the same lot of powder to chrono the same with the same charge weights unless and until they are both stored long enough in the same place to equalize again.

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November 28th, 2020

Firearm Storage Safety QUIZ — How Safe are YOUR Guns?

NSSF resources quiz new firearm gun owner

Do you have a friend or family member who is a first-time gun owner? Then show them this article. It provides important guidelines for new gun owners. There’s an Infographic printed below. And, there’s a helpful Firearm Storage and Safety Assessment Quiz. This walks gun owners through questions related to safe handling and storage of firearms. Here is Part One of the Quiz. If you click on this part, you can complete the entire Quiz and see how you score.

Take Gun Storage and Safety Quiz »

NSSF resources quiz new firearm gun owner

Firearms Safe Storage Video

NSSF Infographic for New Gun Owners
Below is the latest NSSF Infographic for new gun owners. This provides questions to ask before buying a gun, plus information on safe gun storage at home. This Infographic is part of a large collection of NSSF Resources for New Gun Owners.

NSSF resources quiz new firearm gun owner coronovirus covid-19

Want to learn more? CLICK HERE for the Interactive Version of the NSSF Infographic. On that Interactive PDF, click on the smaller buttons to get additional information, or to watch related videos.

Other Gun Safety Resources

NSSF resources quiz new firearm gun owner

NSSF resources quiz new firearm gun owner

Firearms Safe Storage/Transport in Vehicles | Ten Tips for Firearms Safety in Your Home

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