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243 Winchester Rifling Twist Effects:
Written by: Kim Lockhart, Copyright.

True top ballistic performance for the .243 Winchester as a deer rifle can only be realized by understanding the .243 Winchester rifles bore twist rate inside the barrel and barrel length as ammunition selection is critical for the .243 Winchester. Not all .243" bullets are of the same hardness therefore will also expand differently as well as jacket construction some bullets of the same weight will expand and impart their energy into an animals vitals quite well others very little and this is amplified by barrel rifling twist rate and barrel length. The above issues affect a lot of other cartridges as well. Either too much expansion of the bullet or not enough, resulting in slow kills on animals.

 A bullet when it first exits the rifle barrel is very hot, almost molten, as it travels down-range it slowly cools and its expansion properties change as well. Bullet heat increases with faster twist barrels as well, friction between bullet and rifling are greater. Longer barrels also increase bullet heat due to longer friction time frame applied to the bullet. Targets engaged at very close distance will most likely result in bullet failure for light-weight bullets giving very little penetration.

 When choosing a rifle cartridge you should always evaluate what you are going to use the rifle for and then select the rifle with the correct rifling twist rate for your imparticular use by bullet weight to gain the most accuracy and correct bullet expansion.

 A good rule of thumb is that the heavier and longer a bullet is, the faster the rifling twist rate needs to be to stabilize it in flight, therefore a lighter shorter bullet needs a slower rifling twist rate to give proper bullet spin for correct flight and expansion. High velocity, fast spinning light-weight bullets can disentegrate in flight when fired from fast twist barrels and if they don't blow up before reaching a target, they most likely will not be very accurate and if they do reach the target, penetration value will be very low.

 On the other side of this is the very common non-expansion of hunting bullets on game animals, this is normally due to short rifle barrels that feature a slow twist rate and the user tries out the latest heavy hitter deer smashing ammo that features the use of a heavy-weight brush-busting bullet. Out to 25 yards this ammo will most likely work quite well because of the heat the bullet was subjected to prior exiting the rifle barrel, however, at 150 yards all targets engaged simply run off as if nothing happened, problem, non-expansion of the hunting bullet.

 For years this and just this reason alone 80 - 87 grain bullets worked well in 1 in 10 inch twist barrels for deer hunting.

.243 Winchester Rifle Ballistics: 200 Yard Zero.
Rifle Barrel Length: 22 Inches.
Ammuntion: Winchester, .243 Winchester 80 Grain Pointed Soft Point.
Bullet Diameter: .243 Inch.
Bullet Weight: 80 Grains.
Bullet Ballistic Coeffecient: .255.

Note: FPS. = Feet Per Second, FT. LBS. = Foot Pounds & IN. = Inches.
R.P.S. = Revolutions Per Second = Centrifugal Force Value.
Range
Muzzle
50 yds.
100 yds.
125 yds.
150 yds.
175 yds.
Yards
Bullet Velocity:
3,300
3,100
2,909
2,817
2,727
2,639
FPS.
Bullet Energy:
1,934
1,707
1,504
1,410
1,321
1,237
FT. LBS.
Bullet Trajectory:
- 1.5"
+ 0.4"
+ 1.3"
+ 1.4"
+ 1.2"
+ 0.8"
IN.
1 In 10" Twist:
3,960
3,720
3,490
3,380
3,272
3,166
R.P.S.

 100 grain bullets worked well in 1 in 9 inch twist barrels for deer hunting with rifles sporting short 20" - 22" barrels.

.243 Winchester Rifle Ballistics: 200 Yard Zero.
Rifle Barrel Length: 22 Inches.
Ammuntion: Winchester, .243 Winchester 100 Grain Power Point.
Bullet Diameter: .243 Inch.
Bullet Weight: 100 Grains.
Bullet Ballistic Coeffecient: .356.

Note: FPS. = Feet Per Second, FT. LBS. = Foot Pounds & IN. = Inches.
R.P.S. = Revolutions Per Second = Centrifugal Force Value.
Range
Muzzle
100 yds.
150 yds.
175 yds.
200 yds.
225 yds.
Yards
Bullet Velocity:
2,910
2,651
2,527
2,466
2,406
2,347
FPS.
Bullet Energy:
1,880
1,560
1,418
1,350
1,285
1,223
FT. LBS.
Bullet Trajectory:
- 1.5"
+ 1.7"
+ 1.6"
+ 1.0"
0"
- 1.3"
IN.
1 In 9" Twist:
3,880
3,534
3,369
3,280
3,200
3,129
R.P.S.

Rifle Barrel Configurations And Ballistics:
 The centrifugal force of a bullet helps to expand the bullet when the bullet impacts a solid object. Velocity and rifling twist rate determine the ballistic centrifugal force of a bullet so barrel length and barrel twist rate together changes the bullets centrifugal force and as a bullet travels downrange the R.P.S. value is constantly decreasing.
R.P.S. = Revolutions Per Second = Centrifugal Force Value.
Note: Higher R.P.S. = More Expansion Of The Bullet.

.243 Winchester Rifle Ballistics:
Rifle Barrel Length: 26 Inches.
Ammuntion: Winchester, .243 Winchester 100 Grain Power Point.
Bullet Diameter: .243 Inch.
Bullet Weight: 100 Grains.
Bullet Ballistic Coeffecient: .356.

Note: FPS. = Feet Per Second, FT. LBS. = Foot Pounds & IN. = Inches.
R.P.S. = Revolutions Per Second = Centrifugal Force Value.
Range
Muzzle
100 yds.
200 yds.
300 yds.
400 yds.
500 yds.
Yards
Bullet Velocity:
3,010
2,745
2,495
2,259
2,035
1,826
FPS.
Bullet Energy:
2,012
1,673
1,382
1,133
920
740
FT. LBS.
Bullet Trajectory:
- 1.5"
+ 1.6"
0"
- 7.2"
- 21.2"
- 43.7"
IN.
1 In 10" Twist:
3,612
3,294
2,994
2,710
2,442
2,191
R.P.S.
1 In 9" Twist:
4,013
3,660
3,326
3,012
2,713
2,434
R.P.S.

.243 Winchester Rifle Ballistics:
Rifle Barrel Length: 24 Inches.
Ammuntion: Winchester, .243 Winchester 100 Grain Power Point.
Bullet Diameter: .243 Inch.
Bullet Weight: 100 Grains.
Bullet Ballistic Coeffecient: .356.

Note: FPS. = Feet Per Second, FT. LBS. = Foot Pounds & IN. = Inches.
R.P.S. = Revolutions Per Second = Centrifugal Force Value.
Range
Muzzle
100 yds.
200 yds.
300 yds.
400 yds.
500 yds.
Yards
Bullet Velocity:
2,960
2,698
2,451
2,217
1,996
1,789
FPS.
Bullet Energy:
1,945
1,616
1,334
1,091
884
710
FT. LBS.
Bullet Trajectory:
- 1.5"
+ 1.7"
0"
- 7.4"
- 22.0"
- 45.3"
IN.
1 In 10" Twist:
3,552
3,237
2,941
2,660
2,395
2,146
R.P.S.
1 In 9" Twist:
3,946
3,597
3,268
2,956
2,661
2,385
R.P.S.

.243 Winchester Rifle Ballistics:
Rifle Barrel Length: 22 Inches.
Ammuntion: Winchester, .243 Winchester 100 Grain Power Point.
Bullet Diameter: .243 Inch.
Bullet Weight: 100 Grains.
Bullet Ballistic Coeffecient: .356.

Note: FPS. = Feet Per Second, FT. LBS. = Foot Pounds & IN. = Inches.
R.P.S. = Revolutions Per Second = Centrifugal Force Value.
Range
Muzzle
100 yds.
200 yds.
300 yds.
400 yds.
500 yds.
Yards
Bullet Velocity:
2,910
2,651
2,406
2,174
1,956
1,752
FPS.
Bullet Energy:
1,880
1,560
1,285
1,050
849
681
FT. LBS.
Bullet Trajectory:
- 1.5"
+ 1.7"
0"
- 7.7"
- 22.9"
- 47.2"
IN.
1 In 10" Twist:
3,492
3,181
2,887
2,608
2,347
2,102
R.P.S.
1 In 9" Twist:
3,880
3,534
3,208
2,898
2,608
2,336
R.P.S.

.243 Winchester Rifle Ballistics:
Rifle Barrel Length: 20 Inches.
Ammuntion: Winchester, .243 Winchester 100 Grain Power Point.
Bullet Diameter: .243 Inch.
Bullet Weight: 100 Grains.
Bullet Ballistic Coeffecient: .356.

Note: FPS. = Feet Per Second, FT. LBS. = Foot Pounds & IN. = Inches.
R.P.S. = Revolutions Per Second = Centrifugal Force Value.
Range
Muzzle
100 yds.
200 yds.
300 yds.
400 yds.
500 yds.
Yards
Bullet Velocity:
2,860
2,604
2,361
2,132
1,916
1,715
FPS.
Bullet Energy:
1,816
1,505
1,238
1,009
815
653
FT. LBS.
Bullet Trajectory:
- 1.5"
+ 1.8"
0"
- 8.1"
- 23.9"
- 49.1"
IN.
1 In 10" Twist:
3,432
3,124
2,833
2,558
2,299
2,058
R.P.S.
1 In 9" Twist:
3,813
3,472
3,148
2,842
2,554
2,286
R.P.S.

Best .243 Winchester Deer Rifle Ammunition:
 Ammunition manufactured today for .243 Winchester rifles offer deer hunters plenty of great options to get top ballistic performance from the .243 in the deer woods. The top performers in factory ammunition for 1 in 10" twist rifle barrels are Winchester and Hornady for the .243. The 95 grain Ballistic Silvertip from Winchester and the 95 grain SST from Hornady are top performing cartridges that offer long range deep and wide wound trauma performance for most .243 Winchester rifle configurations.

.243 Winchester Rifle Ballistics:
Rifle Barrel Length: 26 Inches.
Ammuntion: Winchester, .243 Winchester 95 Grain Ballistic Silvertip.
Bullet Diameter: .243 Inch.
Bullet Weight: 95 Grains.
Bullet Ballistic Coeffecient: .400.

Note: FPS. = Feet Per Second, FT. LBS. = Foot Pounds & IN. = Inches.
R.P.S. = Revolutions Per Second = Centrifugal Force Value.
Range
Muzzle
100 yds.
200 yds.
300 yds.
400 yds.
500 yds.
Yards
Bullet Velocity:
3,150
2,906
2,675
2,455
2,246
2,047
FPS.
Bullet Energy:
2,093
1,781
1,509
1,272
1,064
884
FT. LBS.
Bullet Trajectory:
- 1.5"
+ 1.3"
0"
- 6.2"
- 18.2"
- 37.1"
IN.
1 In 10" Twist:
3,780
3,487
3,210
2,946
2,695
2,456
R.P.S.
1 In 9" Twist:
4,200
3,874
3,566
3,273
2,994
2,729
R.P.S.

.243 Winchester Rifle Ballistics:
Rifle Barrel Length: 24 Inches.
Ammuntion: Winchester, .243 Winchester 95 Grain Ballistic Silvertip.
Bullet Diameter: .243 Inch.
Bullet Weight: 95 Grains.
Bullet Ballistic Coeffecient: .400.

Note: FPS. = Feet Per Second, FT. LBS. = Foot Pounds & IN. = Inches.
R.P.S. = Revolutions Per Second = Centrifugal Force Value.
Range
Muzzle
100 yds.
200 yds.
300 yds.
400 yds.
500 yds.
Yards
Bullet Velocity:
3,100
2,858
2,630
2,413
2,205
2,009
FPS.
Bullet Energy:
2,027
1,723
1,459
1,228
1,026
851
FT. LBS.
Bullet Trajectory:
- 1.5"
+ 1.4"
0"
- 6.4"
- 18.8"
- 38.4"
IN.
1 In 10" Twist:
3,720
3,429
3,156
2,895
2,646
2,410
R.P.S.
1 In 9" Twist:
4,133
3,810
3,506
3,217
2,940
2,678
R.P.S.

.243 Winchester Rifle Ballistics:
Rifle Barrel Length: 22 Inches.
Ammuntion: Winchester, .243 Winchester 95 Grain Ballistic Silvertip.
Bullet Diameter: .243 Inch.
Bullet Weight: 95 Grains.
Bullet Ballistic Coeffecient: .400.

Note: FPS. = Feet Per Second, FT. LBS. = Foot Pounds & IN. = Inches.
R.P.S. = Revolutions Per Second = Centrifugal Force Value.
Range
Muzzle
100 yds.
200 yds.
300 yds.
400 yds.
500 yds.
Yards
Bullet Velocity:
3,050
2,811
2,585
2,370
2,165
1,970
FPS.
Bullet Energy:
1,962
1,667
1,409
1,185
988
819
FT. LBS.
Bullet Trajectory:
- 1.5"
+ 1.5"
0"
- 6.7"
- 19.6"
- 39.9"
IN.
1 In 10" Twist:
3,660
3,373
3,102
2,844
2,590
2,364
R.P.S.
1 In 9" Twist:
4,066
3,748
3,446
3,160
2,886
2,626
R.P.S.

.243 Winchester Rifle Ballistics:
Rifle Barrel Length: 20 Inches.
Ammuntion: Winchester, .243 Winchester 95 Grain Ballistic Silvertip.
Bullet Diameter: .243 Inch.
Bullet Weight: 95 Grains.
Bullet Ballistic Coeffecient: .400.

Note: FPS. = Feet Per Second, FT. LBS. = Foot Pounds & IN. = Inches.
R.P.S. = Revolutions Per Second = Centrifugal Force Value.
Range
Muzzle
100 yds.
200 yds.
300 yds.
400 yds.
500 yds.
Yards
Bullet Velocity:
3,000
2,764
2,540
2,327
2,124
1,932
FPS.
Bullet Energy:
1,898
1,611
1,361
1,142
952
787
FT. LBS.
Bullet Trajectory:
- 1.5"
+ 1.5"
0"
- 6.9"
- 20.3"
- 41.4"
IN.
1 In 10" Twist:
3,600
3,316
3,048
2,792
2,548
2,318
R.P.S.
1 In 9" Twist:
4,000
3,685
3,386
3,102
2,832
2,576
R.P.S.

243 Winchester:
Reloading
Hunting & Ballistics
50 Yard Sight-In
Rifles
Twist Effects
Model 70's
Hornady Ammo
Remington Ammo
Winchester Ammo

The Hunter's Guide To Ballistics:
Caldwell Stable Table
Caldwell Lead Sled Plus Recoil Reducing Rifle Rest
Caldwell Ultimate Target Stand With Target Backer

Rifle Scope Sight-In - Hunting Rifle Sight-In - Rifle Shooting - Rifling Twist Rates - Rifling Twist Effects