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January 15th, 2025

ZEISS Offers Advanced 15X Binoculars with MRAD Reticle Option

Zeiss conquest hdx binoculars lrp mildot milliradian milrad reticle 15x 15x56 binoculars

ZEISS, a world leader in optics, has released two very impressive new 15-power binoculars: the Conquest HDX and Conquest HDX LRP. These can be used with tripod supports for spotting duties, and with 56mm lenses they offer exceptional low-light performance. The all-new ZEISS Conquest HDX LRP 15×56 (LRP stands for “Long-Range Precision”) is an advanced optic developed specifically for use in Precision Rifle Series (PRS) and National Rifle League (NRL, NRL22, NRL Hunter) competition.

Developed with input from top competitors, the Conquest HDX LRP 15×56 incorporates an advanced milliradian reticle etched onto the internal lens. This reticle helps the spotter determine accurate leads for moving targets and evaluate down-range bullet impacts. This reticle also allows the spotter to make better wind calls and assess needed corrections more quickly and accurately if there is a miss. That all works to help secure maximum points in every stage.

CLICK HERE for full details on the impressive new Conquest HDX LRP and its MRAD reticle.

Zeiss conquest hdx binoculars lrp mildot milliradian milrad reticle 15x 15x56 binoculars

The Conquest HDX LRP 15×56 reticle — a combination of T-style and tree-style designs with a floating center dot — should be familiar to competition PRS/NRL shooters. It matches the reticle pattern commonly used in FFP MilRad riflescopes — especially so with ZEISS LRP riflescopes. That assists with ease of use and making quick calls. The ZEISS HDX LRP reticle design offers a good balance of reference marks and line thickness. The precise, low-center placement of the LRP reticle was selected after extensive testing. It helps reduce eyestrain and curvature distortion.


In this video top PRS competition shooters work with the new Conquest HDX LRP long-range binoculars with MRAD reticle. They show how the reticle can be used to range targets and evaluate shot accuracy to maximize scores during a match.

Also unique to the HDX LRP version are two locking diopter adjustments. One allows for razor-sharp focusing of the reticle. The second allows for an overall sharply focused image of the entire field of view. These adjustments are specific to the individual user’s eyes but are easily changed when necessary.

Zeiss conquest hdx binoculars lrp mildot milliradian milrad reticle 15x 15x56 binoculars

You’ll want a high-quality tripod for effective use of high-magnification binoculars in PRS/NRL competition. The ZEISS Conquest HDX LRP 15×56 incorporates a 1/4-20 tripod adapter port that allows easy installation of the standard ARCA-Swiss tripod adapter — also included with the HDX LRP model.

The basic 15X Conquest HDX has a retail price of $1,899.99 and is available now. The HDX LRP version with MRAD reticle will be available in mid-February with a retail price of $1,999.99. For more information on all ZEISS Conquest HDX binoculars, visit the ZEISS Conquest HDX INFO Page.

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January 15th, 2025

Toast in Six Seconds — The Brutal Truth of Short Barrel Life

Stopwatch barrel life

This thought-provoking article is one of the 15 most popular Daily Bulletin features over the last 12 months. We are republishing this story today for readers who may have missed it the first time around…

Here’s a little known fact that may startle most readers, even experienced gunsmiths: your barrel wears out in a matter of seconds. The useful life of a typical match barrel, in terms of actual bullet-in-barrel time, is only a few seconds. How can that be, you ask? Well you need to look at the actual time that bullets spend traveling through the bore during the barrel’s useful life. (Hint: it’s not very long).

Bullet-Time-in-Barrel Calculations
If a bullet flies at 3000 fps, it will pass through a 24″ (two-foot) barrel in 1/1500th of a second. If you have a useful barrel life of 3000 rounds, that would translate to just two seconds of actual bullet-in-barrel operating time.

Ah, but it’s not that simple. Your bullet starts at zero velocity and then accelerates as it passes through the bore, so the projectile’s average velocity is not the same as the 3000 fps muzzle velocity. So how long does a centerfire bullet (with 3000 fps MV) typically stay in the bore? The answer is about .002 seconds. This number was calculated by Varmint Al, who is a really smart engineer dude who worked at the Lawrence Livermore Laboratory, a government think tank that develops neutron bombs, fusion reactors and other simple stuff.

On his Barrel Tuner page, Varmint Al figured out that the amount of time a bullet spends in a barrel during firing is under .002 seconds. Al writes: “The approximate time that it takes a 3300 fps muzzle velocity bullet to exit the barrel, assuming a constant acceleration, is 0.0011 seconds. Actual exit times would be longer since the bullet is not under constant acceleration.”

We’ll use the .002 number for our calculations here, knowing that the exact number depends on barrel length and muzzle velocity. But .002 is a good average that errs, if anything, on the side of more barrel operating life rather than less.

So, if a bullet spends .002 seconds in the barrel during each shot, and you get 3000 rounds of accurate barrel life, how much actual firing time does the barrel deliver before it loses accuracy? That’s simple math: 3000 x .002 seconds = 6 seconds.

Stopwatch barrel lifeGone in Six Seconds. Want to Cry Now?
Six seconds. That’s how long your barrel actually functions (in terms of bullet-in-barrel shot time) before it “goes south”. Yes, we know some barrels last longer than 3000 rounds. On the other hand, plenty of .243 Win and 6.5-284 barrels lose accuracy in 1500 rounds or less. If your barrel loses accuracy at the 1500-round mark, then it only worked for three seconds! Of course, if you are shooting a “long-lived” .308 Win that goes 5000 rounds before losing accuracy, then you get a whopping TEN seconds of barrel life. Anyway you look at it, a rifle barrel has very little longevity, when you consider actual firing time.

People already lament the high cost of replacing barrels. Now that you know how short-lived barrels really are, you can complain even louder. Of course our analysis does give you even more of an excuse to buy a nice new Bartlein, Krieger, Shilen etc. barrel for that fine rifle of yours.

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January 15th, 2025

Bedding Compounds Recommend by Speedy

Marine-Tex Pillar Bedding Marine-Tex Bedding Block Aluminum Actions

A customer of well-known gunsmith (and Hall-of-Fame shooter) Thomas “Speedy” Gonzalez recently asked Speedy about bedding compounds. Speedy offered some interesting advice based on long-term testing of various materials. Speedy favors Marine-Tex because it is very stable over time, while other materials can shrink up to 6% dimensionally. A good bedding job should be a perfect fit to your barreled action. If the bedding material shrinks over time, that is NOT a good thing….

Speedy’s customer asked: “I know you’re not a Devcon man in regards to bedding compounds but I respect your input in such matters and my question is this in regard to aluminum actions. If Devcon was considered, for an aluminum action, would you prefer aluminum compound formula or steel formula? I personally prefer Devcon steel and Marine-Tex for steel receivers but my experience with aluminum is limited. Also do you have a release agent preference that works better with aluminum?”

Speedy answered: “My only preference of one epoxy over another is their stability over time. My buddy who works for the Texas State Weights and Measures Department had me cast several of the most common types of epoxies used for bedding into 1.000″ machined blocks. After one year of being kept in a controlled climate and measured for shrinkage monthly, the Marine Tex shrunk only 1/10th of 1% (i.e. 0.1%) whereas almost all the others (including Devcon Steel formula, Devcon Aluminum formula…) shrunk 3% to 6%. The only other compounds that matched the Marine Tex were Araldite 1253 and Araldite 2014, with the latter being quite expensive for daily use.”

Marine-Tex Pillar Bedding Marine-Tex Bedding Block Aluminum Actions

Speedy added: “The Marine Tex Grey has no atomized metal in its makeup even though it appears that it does. This can be proven by the use of a strong neodymium magnet. What is humorous to me is that people don’t like aluminum yet will bed their actions atop aluminum pillars that have twice the coefficient of expansion (COE) of steel. Like Devcon, it is what people have always done and used. Thus [they] perpetuate the same old stuff. That’s my two cents’ worth. But as I tell everyone, ‘I’ll tell you what I know or do, but it’s not my job to convince anyone to do it my way’.”

Release Agents — Try Shoe Polish
Regarding release agents, Speedy stated: “I use Kiwi Neutral or Tan shoe polish. This works great and you can find it anywhere. Do NOT use the black or brown as it will stick.”

Marine-Tex Pillar Bedding Marine-Tex Bedding Block Aluminum Actions

View More Photos of Speedy Gunsmithing
On his Facebook Page you can see a variety of other projects by Speedy. Some time ago, Speedy did a bedding job using a custom titanium bedding block. Speedy notes, “The stock was a raw blank requiring full inletting for the action to fit properly plus the titanium block. All the loading ports, bolt handle cut, bolt stop, and trigger guard cuts were done with diamond tooling to eliminate fraying and/or delamination of the wood.”

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