I have researched and have prepared a report on all information I have
collected on .22 caliber rifle cartridges. There are many things that effect the
accuracy and constant placing in shooting. One is the amount of powder in a
cartridge. For example, if one cartridge was made and 3.8 grains of powder were
deposited the shot may be right on. If 4.0 grains of powder were deposited in a
cartridge and it was right on at 3.8 it thus shot would shoot high.
Another factor in accuracy is the shape and what the projectile is made of.
The projectiles that have a rounded point seem to be the most accurate versus a
hollow point or a flat headed projectile. The rounded point seems to be the most
accurate over the flat and hollow point projectile because it will spin and this usually
will make it fly straighter. The hollow point projectile has a grooved hole on the very
front of it and will sometimes cause this to catch air and be knocked slightly off
course. The flat headed projectile will also catch air and be knocked off course,
leaving the rounded point projectile at the top of this category. The material the
projectile is made of also plays a large factor in accuracy. The steel and copper
projectiles seem to be the most affective over the lead projectiles because of the
softness of the lead material. The lead is very soft and can be reshaped very easily by
any bumping or banging into another material that is harder than it. This plays a big
roll in consistency. when the projectile is reshaped or chipped it will cause it to fly
differently, that leads to inconsistency of your shot pattern. Steel or cooper would be
the best choice in this category because of its definite shape. It will always be the
same shape and cannot chip nearly as easy as lead. This leads to a definite flight that
you can count on.
A third example relating to the consistency and accuracy of your pattern is the
size and trim of the brass. When the brass of a cartridge is not trimmed exactly or
very very close to exactly the same as all the other cartridges of its family the
projectile will sit in the shell differently. For example if the brass is trimmed too short
the projectile will sit closer to the powder. This cause the projectile to have more
velocity. When you have more velocity this usually cause your projectile to raise to a
higher level on your target. If your brass is not trimmed straight the projectile will sit
in the casing crooked. This causes the projectile to fire out of the gun at a crooked
angle. This will cause a problem in the accuracy from left to right on your target.
The last major effect on the accuracy and consistency with your shells is the
type of gun you are shooting. Every gun is made different. The grooves in the
barrels are different the chambers are different and the length of the barrels are
different. This means that every gun will shoot every cartridge different than what
gun and projectile you are used to. Note that you wouldn’t be able to even take the
same of used guns and same bullet and exact same distance and sighting and be able
to get the same results.
Some of the cartridges I will test and evaluate are: Remington .22 LR at 40
grains, Remington .22 Yellow Jacket Hyper Velocity at 33 grains, Remington .22
Thunderbolt LR at 40 grains, Winchester .22 Lead Round Nose at 40 grains,
Winchester .22 Lead Hollow Point at 37 grains, . Winchester .22 Wildcat Lead
Round Nose at 40 grains, and the Winchester .22 Lead Round Nose-SV at 40 grains.





http://www.remington.com/ammo/pages/ammofr.htm
Interview: Robert Hundt, 2-8-99
http://www.winchester.com/products/index_rimfire.html