Pennsylvania Game News - April 2015 - 63
lead bullets very well.
Earlier in this article the word "twist"
was used and it is a major factor when
rifling a barrel. Twist is the number of
complete turns that the rifling takes per
inch of barrel. So if you hear that a certain
cartridge has a 1-10 twist, it means the
rifling will spin the bullet one complete
revolution every 10 inches of flight.
Every projectile needs to be stable in
flight for predictable accuracy, and it is
the amount of twist that allows bullets
to fly true.
Twist is determined by the combination of caliber, bullet length and velocity.
Without going into the laws of physics
and mathematical formulas, the general
rule is short bullets need slower twist rates,
and longer bullets need faster twist rates.
The slowest twist rates are found in
muzzleloaders shooting round balls, with
1-48 to 1-60 twist, depending on caliber.
Compare that to a typical 30-caliber
conical-style hunting bullet being shot
out of a .30-30, .308 or a .30-06, which
usually have a 1-10 twist.
Twist is a very forgiving factor, but it
can have its limitations.
For example, most 30-caliber rifles
have a 1-10 twist that will shoot bullets
from 110 to 220 grains reasonably well.
Most 22-caliber centerfires (.222, .223,
.22-250) have a 1-12 or 1-14 twist that
shoots 40- to 60-grain bullets well. But
many competitors prefer, or are relegated,
to shoot a specific weight grain bullet that
does best with a more tailored twist.
Perfect examples are target shooters
who shoot military cartridges and bullets.
Those who shoot .308 cartridges are
relegated to 150- to 155-grain spitzer
slugs, while those who shoot .223 cartridges are limited to 52- to 55-grain slugs.
Both of prefer a 1-12 or 1-14 twist for
optimum accuracy.
Shooters who want to expand the versatility of their high-velocity 22-caliber
centerfires to include the longer match
boat-tail hollow points from 68 to 80
grains should use a barrel with a 1-8 or
1-7 twist for better results. You'll notice
the difference.
Dear Game Commission,
Getting up at 5 a.m. on Saturday, March 29, so I could drive from Erie to the Game
Commission's "Successful Turkey Hunting" course in Freedom took some effort after
working long hours the day before, but it was one of the best things I could have done to
learn about hunting turkeys. I joined 18 other hunters in receiving outstanding instruction on safe and successful turkey hunting. Officer Matthew Kramer and his experienced
turkey-hunter volunteers made it a day to remember. We were able to pattern our shotguns, learn turkey-hunting methods, practice distance estimation, try different turkey
calls, learned how to use a map and compass and, most important, learned turkey hunting regulations and safety. Best of all, the course cost only $15, which is a real bargain.
- Gil Jacobs, Fairview, Pa
APRIL 2015
63
Pennsylvania Game News - April 2015
Table of Contents for the Digital Edition of Pennsylvania Game News - April 2015
Contents
Pennsylvania Game News - April 2015 - Intro
Pennsylvania Game News - April 2015 - Cover1
Pennsylvania Game News - April 2015 - Cover2
Pennsylvania Game News - April 2015 - Contents
Pennsylvania Game News - April 2015 - 2
Pennsylvania Game News - April 2015 - 3
Pennsylvania Game News - April 2015 - 4
Pennsylvania Game News - April 2015 - 5
Pennsylvania Game News - April 2015 - 6
Pennsylvania Game News - April 2015 - 7
Pennsylvania Game News - April 2015 - 8
Pennsylvania Game News - April 2015 - 9
Pennsylvania Game News - April 2015 - 10
Pennsylvania Game News - April 2015 - 11
Pennsylvania Game News - April 2015 - 12
Pennsylvania Game News - April 2015 - 13
Pennsylvania Game News - April 2015 - 14
Pennsylvania Game News - April 2015 - 15
Pennsylvania Game News - April 2015 - 16
Pennsylvania Game News - April 2015 - 17
Pennsylvania Game News - April 2015 - 18
Pennsylvania Game News - April 2015 - 19
Pennsylvania Game News - April 2015 - 20
Pennsylvania Game News - April 2015 - 21
Pennsylvania Game News - April 2015 - 22
Pennsylvania Game News - April 2015 - 23
Pennsylvania Game News - April 2015 - 24
Pennsylvania Game News - April 2015 - 25
Pennsylvania Game News - April 2015 - 26
Pennsylvania Game News - April 2015 - 27
Pennsylvania Game News - April 2015 - 28
Pennsylvania Game News - April 2015 - 29
Pennsylvania Game News - April 2015 - 30
Pennsylvania Game News - April 2015 - 31
Pennsylvania Game News - April 2015 - 32
Pennsylvania Game News - April 2015 - 33
Pennsylvania Game News - April 2015 - 34
Pennsylvania Game News - April 2015 - 35
Pennsylvania Game News - April 2015 - 36
Pennsylvania Game News - April 2015 - 37
Pennsylvania Game News - April 2015 - 38
Pennsylvania Game News - April 2015 - 39
Pennsylvania Game News - April 2015 - 40
Pennsylvania Game News - April 2015 - 41
Pennsylvania Game News - April 2015 - 42
Pennsylvania Game News - April 2015 - 43
Pennsylvania Game News - April 2015 - 44
Pennsylvania Game News - April 2015 - 45
Pennsylvania Game News - April 2015 - 46
Pennsylvania Game News - April 2015 - 47
Pennsylvania Game News - April 2015 - 48
Pennsylvania Game News - April 2015 - 49
Pennsylvania Game News - April 2015 - 50
Pennsylvania Game News - April 2015 - 51
Pennsylvania Game News - April 2015 - 52
Pennsylvania Game News - April 2015 - 53
Pennsylvania Game News - April 2015 - 54
Pennsylvania Game News - April 2015 - 55
Pennsylvania Game News - April 2015 - 56
Pennsylvania Game News - April 2015 - 57
Pennsylvania Game News - April 2015 - 58
Pennsylvania Game News - April 2015 - 59
Pennsylvania Game News - April 2015 - 60
Pennsylvania Game News - April 2015 - 61
Pennsylvania Game News - April 2015 - 62
Pennsylvania Game News - April 2015 - 63
Pennsylvania Game News - April 2015 - 64
Pennsylvania Game News - April 2015 - Cover3
Pennsylvania Game News - April 2015 - Cover4
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