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November 22nd, 2022

Bullet Flight Video Reveals Shock Wave and Bullet Base Drag

Ever wondered what the air around a moving supersonic bullet really looks like? Check out this video from the Bryan Litz Ballistics Facebook page. This is a Schlieren video* of a 6mm 109gr Berger LRHT bullet at about 2800 fps as fired from Francis Colon’s PRS rifle at the Applied Ballistics Lab.

Bryan Litz notes: “You can clearly see the compression (shock) wave at the front of the bullet. A compression wave is formed when the air has to move faster than the speed of sound to get out of the way, which is certainly the case for this bullet which is moving about 2.5 times the speed of sound (Mach 2.5).

That shock wave is the ‘snap’ you hear when bullets fly past you if/when you’re downrange. Also, compressing the air into a shockwave takes energy, and that energy comes directly out of the forward velocity of your bullet and gets converted into heat and noise as the shock wave forms and dissipates.

The turbulent wake at the base of the bullet shows where/how base drag applies. The third and smallest component of drag for a supersonic bullet is skin friction drag, which is a viscous boundary layer effect, and is the least visible in this image. So as you head to the range or the hunting stand, think about the absolute violence your bullets are committing in the atmosphere, before they even reach the target!”

Subscribe to the Science of Accuracy Academy for more precision rifle and long range shooting content. LINK: TheScienceofAccuracy.com.

Science of Academy Contest
The Science of Accuracy Academy is currently running a contest for new subscribers. The winner receives a Vortex Fury HD 5000 Laser Rangefinder Binocular unit with Applied Ballistics functionality. Act soon — the deadline to enter is November 23, 2022 at 1:00 pm Eastern.

* Schlieren imaging makes air flow features visible. SEE Schlieren Photography Wikipedia page.

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November 22nd, 2022

Save Money with Brownells Discount Codes This Week

If you’ve been thinking about a big purchase at Brownells, here are some money-saving codes. Brownells is currently offering $40 Off a $250+ purchase, $20 Off a $250+ purchase with FREE Shipping, $20 Off a $200+ purchase, $15 Off a $150+ purchase, and $10 Off a $100+ purchase.

It’s simple to get these discounts — there are no buyers’ clubs to join, no forms to fill out. Just use the appropriate Discount Code during online check-out.

Listed below are the Codes to use. Simply use the appropriate Code for your purchase at Brownells.com. As these Codes may be deactivated without notice, if one Code doesn’t work, try a different Code and you can still save some buck$. Also if the highest value code no longer works, try a lesser value CODE.

Coupon Code: 40OFF250 — $40 Off $250 or more
Expiration date: 11/23/2022 at 11:59 pm

Coupon Code: BF40SHIP — $40 off $500 or more plus FREE Shipping
Expiration date: Unknown

Coupon Code: BF20SHIP — $20 off $250 or more plus FREE Shipping
Expiration date: Unknown

Coupon Code: 20OFF200 — $20 Off $200 or more
Expiration date: Unknown

Coupon Code: TA10 or WLS10 — 10% off $150 or more
Expiration date: Unknown

Coupon Code: BACK15 — $15 Off $150 or more
Expiration date: Unknown

Coupon Code: HOME10 — $10 Off $100 or more
Expiration date: Unknown

Coupon Code: Q63 — FREE Shipping over $99
Expiration date: Unknown

NOTE: Most of these codes have no listed expiration date, so Brownells could terminate them at any time. Accordingly, we recommend you do your shopping soon. Also check the Brownells home page for the latest Promo Code.

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November 22nd, 2022

Prone Shooting Technique — Mastering the Prone Position

Shooting Sports USA (SSUSA) offers a wide selection of informative articles on marksmanship techniques. If you shoot prone, “hard-holding”, you know how important proper positioning and technique can be. There is a SSUSA article that every prone shooter should read — whether you shoot air rifle, smallbore, or High Power. Compiled wtih the help of some of the country’s best prone marksmen, this article, How to Master Prone Shooting, provides a step-by-step guide to perfecting your prone position technique.

READ Full Article on Shooting Sports USA »

How to Master Prone Shooting — SSUSA by NRA Staff
The prone position is the most precise of the rifle shooting positions. It is used in many different shooting events at distances as close as 5 meters and as far away as 1,000 yards, and beyond that in long-range disciplines such as PRS and NRL. Prone shooting is very popular among shooters whose training time is limited, because it does not require as much practice. Age has little effect on a shooter’s ability to do well in prone; many older shooters are able to continue competing successfully in prone matches.

Here is a sample, listing STEP ONE, the basics of the prone position:

Step One: Study the Position
The prone position is steady because it is low, which gives a wide base of support to help keep the rifle still. Below are the key features of the prone position.

1. Straight line form left hand through left arm, side and leg.
2. Head tipped down comfortably.
3. Right hand grips rifle lightly.
4. Body lies behind rifle. Angle to rifle is 10 to 20 degrees.
5. Right knee bent slightly, toe pointing out.
6. Rifle lies on heel of left hand, fingers relaxed.
7. Left elbow rests to left of rifle.
8. Sling (if present) supports weight of rifle. Left arm relaxed.
9. Body rests slightly more on left side.
10. Left leg straight, toe pointing inward or straight back.

There are FIVE MORE STEPS described in detail with specific actions to perform, in the FULL Article. For example, in STEP FOUR (Sling Adjustment), the article explains: “Put the sling high on the arm and tighten the sling keeper. Wrap the arm around the sling so that the sling comes across the left hand and forearm.”