Ballistic coefficient: What is it? Part 2

by Tom Gaylord
Writing as B.B. Pelletier

Part 1

This report covers:

  • Review
  • Today’s discussion
  • Round balls
  • Conical bullets
  • Smokeless powder
  • A big point
  • Shape
  • Round balls — again
  • The bottom line

I’ve taken 11 months to return to this subject of ballistic coefficients (BC). That was in spite of some tremendous interest in Part 1 of this report last May.

I’m purposely avoiding all discussion of mathematics, which is difficult, since ballistics is a discipline that heavily employs mathematics. But I’m not qualified to write about the math; and, more importantly, I know that 99 percent of my readers would be turned off if I were to write the report that way.

Review

Last time we learned that the BC of a pellet:

• Is an extremely small decimal fraction compared to the BC of a conical bullet.
• Varies with the velocity of the pellet.
• Varies with the shape (form) of the pellet.

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Back to the basics — Scope tips: Part 3

by Tom Gaylord
Writing as B.B. Pelletier

Part 1
Part 2

This report covers:

  • Droop — or downward slant
  • My point is…
  • I must care about this
  • Scope placement

This series examines the task of mounting a scope on an air rifle and sighting it in. Part 2 addressed mounting a scope, but it didn’t cover all of the problem areas, so today I’ll continue the discussion.

Droop — or downward slant

I will say that 80 percent of all the firearms and airguns I have examined have some degree of downward slant of their bores in relation to the line of sight of a scope that’s mounted on them. And I will go on to say that half of those are so serious as to cause problems. The airgun term for this is droop. The firearm world has no term for it and is generally ignorant of the problem. The single firearm that doesn’t seem to have this problem to the extent mentioned here is the AR platform. Perhaps the designers recognized the problem and solved it through engineering. I don’t know, but ARs seem to be relatively droop-free.

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Back to the basics — Scope tips: Part 2

by Tom Gaylord
Writing as B.B. Pelletier

Part 1

This report covers:

• What we’re doing
• Many things going on
• First things when mounting scopes
• Clean the gun and mount
• The mount
• Installing the mount
• Install the scope
• Install top caps and screws
• Align the vertical reticle
• Time to tighten the caps

What we’re doing
Today, I’m going to mount a scope for you and show some of my mounting techniques. These have been available for 10 years in the Pyramyd Air articles pages as a 3-part series — Part 1, Part 2 and Part 3.

Many things going on
I’ll also add some things to this report. For starters, I’m making this a multiple blog by also reporting on the new Diana Bullseye ZR recoil reducing scope mount. And, I’m installing this mount on the BSA Supersport SE that I promised would have a Part 4. Another benefit! Finally, I selected the Aeon 8-32X50 AO scope with trajectory reticle for the rifle. The special trajectory reticle can be useful when shooting rifles at different distances. Aeon also has the same scope equipped with other reticles.

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Things you can do to make your new airgun better: Part 3

by Tom Gaylord
Writing as B.B. Pelletier

Part 1
Part 2

This report covers:

• Shoot it!
• Test it!
• Clean it — maybe
• Oil it — maybe
• Keep your hands off!

Today, I’m going to look at precharged pneumatics (PCP). Maybe you thought these came ready to go right from the factory, and in many ways they do; but even with this powerplant, there are always things you can do to make the guns shoot better.

Shoot it!
The first thing is something most people are going to do anyway — I just want to make you aware of how it affects your gun. Shoot it! Don’t take it apart to see how it works and if you can “correct” all the flaws the “stupid” factory left in the gun when they made it. Don’t send it off to be tuned. Just shoot the thing, and it will get better.

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Things you can do to make your new airgun better: Part 2

by Tom Gaylord
Writing as B.B. Pelletier

Part 1

This report covers:

• CO2 facts
• CO2 is a self-regulating gas
• The temperature thing
• Piercing pin problems
• Chilling bulk-fill guns to fill better
• Crosman Pellgunoil
• Automatic transmission stop leak
• Getting more power from a vintage CO2 gun

It took me long enough to get back to this report! I guess the SHOT Show and some other things just busied-up my schedule. But, this afternoon, I was installing a CO2 cartridge in a gun and had a little difficulty…when it hit me — I need to tell the readers about that! So, today I’ll talk about CO2 guns just a little.

When airgunner Jennifer Cooper Wylie asked for this report on my facebook page, I think she was looking for tuneup tips. I’ll give them, but mixed in will be some common maintenance tips, as well. We’re looking at CO2 guns today, and it’ll be helpful to remember what we know about CO2.

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Back to the basics — Scope tips: Part 1

by Tom Gaylord
Writing as B.B. Pelletier

This report covers:

  • Reason for this report
  • What I won’t do!
  • Things to consider when mounting a scope
    • Consider the scope mounts.
    • Consider the type of scope
    • Consider the gun and where the scope has to fit
    • Pay attention to how much elevation your new scope needs
    Summary

    Reason for this report
    This report is for a friend who recently acquired a new-to-him 30-06 bolt-action rifle. He asked me for some tips on mounting a scope and sighting-in the rifle, and I’m afraid what I gave him was a college-level course instead of the basic information he needed. Despite my “help,” he stumbled through the process, making many mistakes as he learned what I am going to try to tell you in this report.

    This misadventure opened my eyes to a need for even more basic instruction about rifle scopes. If my friend is having problems, so are hundreds of others who read this blog.

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Buying and selling airguns on the internet: Part 2

by Tom Gaylord
Writing as B.B. Pelletier

Part 1

This report covers:

• The shyster dealers
• Weasel wording
• Bad photos
• How to spot an honest dealer
• Honest vs. dishonest: What’s the verdict?

The shyster dealers
Today, let’s start out talking about those internet dealers who are less than honest. I’m not talking about the scammers who are certainly out there. They’re the people with nothing at all to sell. All they want is for you to send them money, and you’ll never hear from them again.

I’m talking about the dealers who do anything to mislead you about the real airguns they’re selling. They have actual guns to sell, but they describe them in dishonest ways. I’ve dealt with a few and discovered a great many others, so this should be interesting. Remember, I’m primarily talking about buying guns on the Gun Broker website, though this does apply to most websites where selling takes place.

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