Advanced Ballistics SDI
Service Pressure
------ is defined as the maximum PSI below which you can safely operate, and above which you can anticipate trouble:
Speed and direction of the wind
A bullet's reaction to wind depends on what two factors?
120
According to the author, about _____ rounds should be initially used to test the projectile that you have created.
True
Achieving the proper COL for the combination of bullet, case, primer, and powder specified in the data manual will ensure safety, accuracy, and proper function.
Gravity and the force due to the air flow around the bullet.
After a bullet leaves the rifle barrel, what two forces act on the bullet's trajectory?
The seating die
After trimming, priming, and loaded the case with powder, what is now needed in your press?
The science of moving projectiles
Ballistics deals with
Adjusting the depth of the decapping pin's travel and thus the length of its rod
Before you size the first case, what must be done to prevent the decapping pin retainer from bottoming out and bending the rod?
False
Cartridge overall length is not important to safe functioning of your reload in your firearm.
Improperly trimmed cases.
Dents in the case shoulder are caused by all of the following except:
False
Despite the extreme stresses places on cases, because of obturation, previously fired brass cases do not require special preparation before being reloaded.
Uniform
During case preparation it is important to ------ of the above the flash hole.
Neck sizing
During the ------- operation, obturation presses the sides of the cartridge against the walls of the die.
.001 inch
For extreme accuracy, cartridge run out should be kept to:
True
For extreme accuracy, it is a good practice to uniform the flash hole, even on new brass.
Sorting by manufacturer
For greatest potential accuracy, after you have separated the brass that was fired from your own gun from that which was otherwise procured, what is the next step?
It should be facing up
For most presses with the priming feature, which way should the primer anvil be facing?
Shellholder
Full-length sizing die setup begins by inserting the ______ into the top of the press's ram.
Case tension; polished throat.
If the desired effect is to use a hunting load that will touch the lands of the rifling , you must create good __________ and a nicely _________.
The reloader must anneal the remainder of the brass.
If the temper of the brass is poor and leads to split neck cases, what remedial action should take place for the remainder of the cartridges in the bin?
How many times its been fired That the cases are the correct chambering for your gun Check the headstamp for caliber designation ***Both B & C***
If you are using "range brass," what must you make sure of before reloading?
False
If your rifle is shooting 1.5 MOA, a technique like flash hole uniforming can make big changes in accuracy.
Concentricity
In order to achieve optimal rifle accuracy, it is recommended that the reloader purchase a
Mountainous or hilly areas
In what type of terrain are vertical winds usually encountered?
True
Increasing neck tension can sometimes obtain more uniform pressure and velocities.
False
Many authorities believe American shooters consistently use buckshot that is too small for the required shooting task.
G- zero range E- mid range height C- line of departure A- sight height F- baseline D- projectile trajectory B- line of sight
Matching question. Match the terms of trajectory to the labels indicated in the picture below:
Lee Precision, Mayville Engineering, and Hornady
Name three popular brands of shot gun reloading presses on the market today.
True
Shotshell reloading has become more relevant than ever due to the availability of lighter loads, non-toxic loads, and a variety of hulls.
Size and composition
Standard options for shot include ---
True
The Hornady concentricity tool is useful due to the ability to bump ammo but cannot help with troubleshooting.
Sir Isaac Newton
The ballistic pendulum was based upon laws of mechanics formulated by:
True
The cleaning of the primer pocket cannot be done until the primer is removed.
True
The dent, coming from the firing pin striking the metal side of the primer, creates the pressure needed to ignite the priming mixture.
Ten-thousandths of an inch
The measurement for overall case length is taken from the flat of the case head to the opening of the case mouth, and the length is always expressed as a maximum dimension less _____________.
Higher rate of cartridge assembly compared to single stage press
The primary advantage of a Progressive press is:
True
The shellholder is specific not to caliber, but rather to the dimensions of the case head.
Cartridge-specific
The sizing die is ________ and needs to be fitted into an appropriate reloading press.
None of the above
The sizing die is ________ and needs to be fitted into an appropriate reloading press.
False
The star fold crimp style demonstrates greater load-to-load consistency of tested speeds and pressures. .
A one‑piece, injection‑molded, compression‑formed hull
The two fundamental designs of plastic hulls in use today are a two-piece straight-sided hull and
100 yards
Though some shotguns are capable of more, most are most effective under ----- yards
True
To achieve proper obturation on a resized case, it is preferable to focus on the dimensions of a minimum chamber specification, one that has only the slightest clearance needed to easily and safely chamber the round.
arsenic; antimony
Traditionally, lead pellets contained both _________ and _________.
False
True or false: A shorter bullet is generally more stable when traveling through the bore.
Case capacity; pressure problems.
Variations in brass weight can cause both __________ and _________.
there is not much point in adjusting the jump by a very small fraction
We want to see something measurable when manipulating barrel harmonics by adjusting seating depth. Therefore,
Measures the precision of hulls and reloaded shells
What does a shotshell checker do?
The amount of pressure necessary for the bullet to overcome the initial forces of friction
What is "start pressure?"
All the above
What is a major consideration when beginning to prime?
Only use the primer brand and size specified for the load you are using Verify there are no crimps in the case Wear safety glasses ***All of the above***
What is a major consideration when beginning to prime?
Safety
What is always the first consideration when reloading any cartridge?
The ability of a case to expand and then return to its basic shape
What is case obturation?
Weak and uneven powder burn
What is one of the effects of a cartridge that is filled with too little powder?
Sea level
What is the altitude used for most ballistics tables?
The bullet loses stability in flight and can cause wide fliers.
What is the effect that is caused by too much copper fouling in the bore?
Cam-over
What is the name for backing off the ram slightly and screwing in the die an additional 1/8- to ¼-turn?
Krupp test data
What is the name of the test data, compiled in Germany in 1881 that turned out to be the basis for ballistics tables for small arms right up to the present time?
Round
What is the preferred shape of shotgun pellets?
To package the powder and shot in a neat, complete unit
What is the primary function of the hull?
The meplat
What is the proper name for a bullet tip
Deburring the inside and outside of the neck with a chamfering tool
What must be done after any trimming operation?
Re-priming & De-priming
What process could cause live primers to detonate? (choose all that apply)
Reducing recoil
What will adding weight to your gun help with?
It will give you the COL measurement of the loaded round after soft-seating
What will using the dial or electronic caliper and measuring the case from the meplat to the flat of the case head where the primer is located do?
High
When shooting uphill, the gun will shoot
Discard it
When sorting brass, what should you do if cracks, splits, or head separation is detected?
Attempt to reprime again
When using a progressive shotgun press, if the primer is not fully seated and sticks out, what is the first remedial action you should take?
True
Where no data exists for a given bullet weight, it is sometimes possible to interpolate book data using the 1 grain of powder per 10 grains bullet weight.
Resizing the case to a reusable state
Which is typically the first step in reloading in which a die is used?
A powder trickler
Which of the following allows great precision in your powder loading?
Teflon wrap
Which of the following can be rolled into a cylindrical shape around a slug and inserted into the hull?
Single-stage and progressive
Which of the following indicate the types of shotshell presses available?
Typical muzzle velocity
Which of the following is a difference between shotguns and rifles?
Thin circular flake or wafer Cylindrical shape Small sphere
Which of the following is a form of smokeless powders?
Carefully following instructions
Which of the following is one of the most important concepts in successful shotshell reloading?
Marking the ammo
Which of the following is the last step in the reloading process?
They are cheaper rounds designed for one time use
Which of the following is true about promotional loads?
A concentricity guage
Which of the following measures the radial run out of a finished round?
Wads
Which of the following seals the powder away from the shot and prevents the burning gases from leaking through the balls of shot?
Cam-over
Which of the following should not be done with a carbide die?
Filler wads in the base of the shot cup are indispensable to the reloader
Which of the following statements is false?
The turret
Which press is essentially single-stage but can be mounted with various dies at one time?
The progressive pressq
Which press is the predominant choice among shotgun reloaders?
Resizing
Which process compresses metal and reforms it to a specified dimension?
A beam scale
Which reloading scale is accurate, inexpensive, and not affected by changes in atmospheric pressure?
Robins
Who invented the ballistic pendulum in the year 1740?
Tartaglia
Who was the first person to prove that trajectory is a curve, and not a straight line?
