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Medford Rifle and Pistol Club

On-Line Newsletter

 

 

 

 

NSSF Rimfire Championship Link

www3.nssf.org/rimfire/championship/?utm_source=bulletpoints&utm_medium=text&utm_campaign=rimfire

 

 

MRPC  Fullbore Rifle Practice

 

It is only to be 90 degrees this Wednesday   8-30-17

so we will shoot on the Camp White Range

from 600 yards at 5 PM.

If the smoke will let us see the targets

Firing 22 rounds or less

From either a prone or benchrest position

 

Frank 541 899 6872

 

 

FYI

Soft Drink Machine at the Indoor Range is broke.

It will be a few weeks before it can be fixed

 

 

“Repeal 719” Ballot Referendum Initiative

                                                                   August 24, 2017    From Bill Post, Oregon House District 25

I know that many in Oregon are VERY upset that SB 719 passed.  Therefore a group of us are working to repeal it via the ballot.  We need your help. 

Why are we doing this?

·         SB 719 calls for the forced confiscation of property by the police with no due process, no accusation of a crime let alone conviction of a     crime.

·         It allows people with no mental health credentials to make assessments of another’s state of mind and

it allows people with no mental health credentials (judges) to punish people they have never met or spoken to.

·         Furthermore it actually forbids judges from considering assessments of the respondents mental health by people who actually DO have        mental health credentials.

·         The law allows a judge to confiscate every firearm in a household because one person there has ever has a DUI conviction.

·         The law provides no help whatsoever for a person who has been accused of being suicidal.

            In fact, an amendment that would have called for some minimal intervention was not even considered.

·         The law provides NO protection for people who are living in the household of a person who has been accused of being a danger to others.

·         The law provides no guidance for the police who are tasked with confiscating the firearms of the person who has not been accused of or          tried for a crime.

·         The law allows 24 hours for the respondent to turn over firearms even though in many cases that is not possible. That 24 hour window is       clearly a time of extreme danger in the event the respondent actually IS a danger to self or others.

·         The law defines no provisions for determining how many firearms the respondent has, or how to assure they have all been seized and lastly    and probably most importantly to me:

·         Governor Kate Brown stalled signing this bill into law which greatly limits the amount of days to gather signatures, thus depriving        Oregonians of their constitutional rights.

 

So, what do you do and how can you help?

 

Below are the links for the two sided petition sheets.  They need to be printed back to back.  So, first download each (they are pdf files) then print the first sheet, turn the paper over and print the “cover sheet” on back.  Once you have filled a sheet out (read the instructions carefully on the cover sheet and down below on this page) send them in to the addresses listed.

 

Here are the two sheets to download to go gather signatures:

10 line petition sheet Repeal 719

Cover Sheet to print on back of petition sheet

Mail completed sheets to any of these:

Teri Grier

Bill Post

Mike Nearman

94342 Sether Street Ln

5135 Lacey St N

2570 Greenwood Rd S

North Bend OR 97459

Keizer OR 97303

Independence OR 97351

PLEASE read the instructions CAREFULLY!  Every page we have to toss out means starting over again!!

Instructions for Circulators

Only active Oregon voters may sign a petition. Ask each signer if they are an active registered voter in Oregon.

A single circulator must personally witness all signatures collected on any one signature sheet. After witnessing each signature on a sheet, use a pen to sign and date the circulator certification.

Initial any changes you make to the date you signed the certification. A complete list of allowable circulator certification corrections is provided in the Circulator Training Manual available at www.oregonvotes.gov

 It is against the law for circulators to:

Circulate a petition containing a false signature.

Make false statements to any person who signs the petition or requests information about it.

Attempt to obtain the signature of a person who is not qualified to sign the petition.

Offer money or anything of value to another person to sign or not sign the petition.

Sell or offer to sell signature sheets.

Write, alter, correct, clarify or obscure any information about the signers unless the signer is disabled and requests assistance or the signer initials after the changes are made.

Accept compensation to circulate a petition that is based on the number of signatures obtained.

Warning Violations of the circulator requirements may result in conviction of a felony with a fine of up to $125,000 and/or prison for up to 5 years.

Instructions for Signers

Only active Oregon voters may sign a petition. Use a pen to sign your name, as you did when you registered to vote.

Provide the date you signed the petition, your printed name and residence address. Only you may complete this optional information.

Initial any changes the circulator makes to your printed name, residence address or date you signed the petition.

 It is against the law for signers to:

Sign another person’s name under any circumstances.

Sign a petition more than one time.

Sign a petition when you are not qualified to sign it.

We will have a single signer, downloadable petition on our “repeal 719” website soon.

The next part that we could really use help on is the signature verification process.  Once petitions begin to come in, you can volunteer to verify signatures against the voter files.  It’s an EASY, web based process that anyone (that means you Grandma!) can do, and a great way to get involved!!  If you’d like to volunteer please send an email to: mike@repeal719.com

Remember our deadline is 5:00 pm on October 5, 2017 so time’s a wastin’!

 

LASTLY and very, very important:  You can DONATE to help us do this thing!!  We have created a Political Action Committee (PAC is name “Repeal 719 PAC”) for which your Oregon Political Tax Credit can be used ($50 per person, $100 per couple).

Click on THIS DONATE NOW button below and help us get this on the ballot!!

http://billpost.us/wp-content/uploads/f79234a5-e2a4-4fe7-9b3e-a973a541dee7.png

 

This is the link to the actual bill itself which if anyone asks, you can provide to them.

Senate Bill 719

So, now you have ALL that you need to get going!!  As soon as we have the “Repeal 719” website up and running, we’ll let you know, for now, you have all that you need to get started collecting signatures.  PLEASE read the instructions CAREFULLY!  Every page we have to toss out means starting over again!!

 

 

 

What You Should Know About .22 Rimfire

by Michael Bussard – Wednesday, August 16, 2017

This article was first published in Sept. 2010. The author is former NRA Publications Technical Editor. 
Images copyright American Rifleman

In the subconscious mind of most shooters, the .22 Short, Long and Long Rifle rimfire cartridges form part of the bedrock of shooting sports. Their ubiquitous availability, affordable price, consistent quality and wide product range are taken for granted. Few shooters stop to consider the many difficulties inherent in the design and manufacture of these cartridges.

https://i1.wp.com/www.americanrifleman.org/media/2995995/rimnomenclature.jpg?resize=446%2C201&ssl=1https://i1.wp.com/www.americanrifleman.org/media/2995990/22rimfire_cutout.jpg?resize=256%2C225&ssl=1

If you set out to design a self-contained cartridge that is difficult to make and suffers from numerous design shortcomings, it would be the humble .22 Short, Long and Long Rifle (.22 rimfire).

Design Shortcomings 
On a good day, the ignition potential of the .22 rimfire priming system is weak. Because there is no anvil, the lead styphnate rimfire priming compound requires the addition of ground glass as a frictioning agent. Ground glass is not "bore friendly," but without it, .22 rimfire priming will not function. And, to date, no lead-free priming compounds suitable for .22 rimfire have been found.

Ignition begins on the side of the case where the rim is crushed by the firing pin; there is no flash hole to focus the ignition gasses into the center of the powder charge. Failure to press the priming compound reliably and evenly inside the annular rim cavity can lead to misfires and high variations in muzzle velocity. 

It is important to remember that the .22 Short and Long Rifle cartridges were originally designed for and loaded with easily ignited black powder. However, smokeless propellants have dramatically different ignition requirements and burning characteristics. Propellant makers soon found that the .22 rimfire design was not friendly to early smokeless propellants. They struggled for decades to find suitable smokeless propellants and the search continues to this day.

Essentially, the .22 rimfire requires unique smokeless propellants with a high energy content that are easily ignited and burn progressively. Limited case capacity dictates a dense powder with a small flake or ball configuration. Propellants with large flakes, sticks or coarse grains cannot be used as they will not drop uniformly through the holes in .22 rimfire plate-loading machines.

To facilitate ignition, .22 rimfire bullets must be heavily crimped into the case mouth to increase shot-start forces. Of necessity, this deforms the bullet. However, even on a good day, only about half of the propellant in a .22 rimfire cartridge burns completely.

The weak case head is the Achilles heel of the .22 rimfire cartridge. For this reason, Maximum Average Pressures (MAP) of .22 rimfire ammunition must be kept below 24,000 psi. Rimfire cases must have enough spring-back to assure consistent extraction in blowback-operated semi-automatic guns, yet remain soft enough to prevent splitting. This is a narrow margin that also eliminates steel as a .22 rimfire cartridge case material. Design parameters require all rimfire cartridge cases to be rimmed. Necked rimfire cases require several additional production steps which adds considerably to their cost. Rimfire cartridge cases cannot be reloaded.

All .22 rimfire bullets tread a fine line between function and accuracy. The bearing surface of .22 rimfire bullets is the same diameter as the outside surface of the cartridge case. This makes lubrication of such bullets difficult as the case-diameter bullets must be lubricated on the outside where it may be wiped off or contaminated. Lubricants for lead, center-fire bullets are unsuitable for rimfire ammunition, and, unfortunately, copper-plating serves no ballistic purpose, does not eliminate the need for lubrication, adds cost and damages the bullets.

Case-diameter bullets also limit bullet shape, weight, balance and bearing surface. Another significant problem is that .22 rimfire bullets have an undersized, cupped base that the propellant gases must expand reliably and evenly into the rifling grooves for proper sealing and stabilization.

Headaches of .22 Rimfire Production
Centrifugal force is used to push the priming compound into the hollow rim of the cartridge case. This is accomplished by dropping a wet pellet of priming compound into the bottom of the cartridge case, inserting a closely fitting steel pin, then using the pin to spin the case at speeds of approximately 10,000 rpm for a few seconds. This is a tenuous process at best and frequently fails to completely fill the rim with priming compound.

https://i2.wp.com/www.americanrifleman.org/media/2995982/22ammo_9.jpg?resize=539%2C303&ssl=1                              https://i0.wp.com/www.americanrifleman.org/media/2995988/22ammo_2.jpg?resize=314%2C301&ssl=1

Preparing the small, wet primer pellet and inserting it in the cartridge case is hazardous hand work—part art and part training. The moisture content of the priming compound must be carefully controlled within narrow limits, otherwise the mixture will not work at all. The ground glass in the priming compound increases wear on the steel spinner pins and excessive smearing of the priming compound up the case sidewalls (a common problem) can adversely affect ignition and interior ballistics.

Ammunition makers also struggle continuously to find suitable rimfire powders. The ideal .22 rimfire propellant must be competitively priced and compatible with plate-loading systems. It must have a high energy content, ignite easily and burn progressively while leaving a minimum of unburned propellant. Very few propellant powders meet these requirements. 

Due to the weak ignition, powder residue from partially burned and unburned powder are constant problems—just ask any indoor shooting-range operator. The high ballistic performance required by many modern .22 Long Rifle loads places severe interior ballistic requirements on propellants. On the other hand, low MAPs can cause uneven expansion of the lips of the cup on the bullet’s base and poor accuracy. In some instances, high MAPs can blow the lips of the cup base completely out.

In order to obtain the high muzzle velocities advertised for many .22 Long Rifle loads, MAP limits must be pushed to levels that leave little margin for error given the weak case head. Also, the proper case hardness gradient must be maintained to prevent extraction and/or ejection problems in spite of variations in brass strip and tooling.

Rimfire .22 ammunition makers fight a constant battle with bullet lubrication. It is ironic that such a cheap cartridge requires highly specialized, micro-crystalline, synthetic-base waxes for lubrication and costly systems for application. Often, what works today does not work tomorrow due to minor variations in temperature, humidity, bullet hardness, propellant variations, etc.

Bullet hardness (antimony content) can be a particularly difficult problem as small variations can result in lead buildup of rifle bores and inaccuracy. Rough handling of .22 rimfire bullets on the factory floor can easily have an adverse effect on accuracy.

Crimping the .22 LR bullet into the case mouth properly remains a constant problem. Too heavy a crimp may push MAPs over the limit, adversely affect accuracy and cause leading. Too light a crimp may result in erratic breech pressures, high variations in muzzle velocity, excess unburned propellant and malfunctions in semi-automatic firearms. As if this were not enough, the driving knives on the crimping operation mangle the bullet. 

Overview of the Impossible
We have seen that the inherent characteristics of the .22 LR rimfire cartridge are its own worst enemy and the leading cause of its manufacturing difficulties. However, before we condemn its design, we must remember that the .22 LR rimfire cartridge is a product of the technology and art of the 19th century. With the benefit of today’s technology, ammunition makers produce safe, reliable, low cost .22 LR cartridges of average quality in mind-numbing quantities. However, they cannot produce a match load on demand. That is the art.

On the other hand, the .22 LR is nothing if not adaptable. Its repertoire includes instruction, training, practice, qualification, informal competition, formal competition, plinking, pest elimination, small game hunting and even personal defense. Few other cartridges are this versatile. And, that is why the .22 LR rimfire cartridge remains a bedrock of the shooting sports.

 

 

This information is provided to our members solely as a service.

The opinions expressed are not the official position of MRPC, its Board, Officers or Directors.

Each member is encouraged to conduct their own study of these matters.

 

 

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