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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. Many .243 Winchester rifle shooters over several decades have shot deer with a .243 and watched as the deer runs off without a sign of a hit and assumed a miss when in fact bullet placement was where they intended it to be. The bullet most likely did not expand enough and impart its energy into the animals vitals.

 This scenerio happens more often than most hunters think, it is very noticeable for the .243 Winchester because of the smaller bullet diameter creating a very small diameter wound chanel through the animal as the reason also for the animal not reacting violently to the shot or wounding.

 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.

 One of the factors that play into this scenerio is centrifugal force that is applied to all bullets by the rifling twist rate. Remington rifles have a 1 in 9" & or 1 in 9.125" twist where as Winchester and many other rifle manufacturers use 1 in 10" twist in .243 Winchester rifle barrels.

 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 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.

 The second factor that plays a part in this scenerio is barrel length, the .243 Winchester was originally designed with the thought of 24 inch barrel lengths to achieve a high enough velocity for all bullets to work properly at reasonable distances. Most .243 Winchester rifles are manufactured with 22 inch barrels.

 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.

22" Barreled .243 Winchester Deer Rifles Review:
 The .243 Winchester was originally designed with the thought of 24 inch barrel lengths to achieve a high enough velocity for all bullets to work properly at reasonable distances. Most .243 Winchester rifles are manufactured with 22 inch barrels instead. For many years this and just this reason alone 80 - 87 grain bullets worked well in 1 in 10 inch twist barrels for deer hunting and 100 grain bullets worked well in 1 in 9 inch twist barrels for deer hunting with rifles sporting short 22" barrels.

 Humane harvesting of thin-skinned big game such as Deer with a high powered rifle with a bore diameter of .308 or less requires that, the bullet needs to have at least 1,200 foot pounds of energy down-range at point of impact, when it impacts the animals vitals (Heart & Lung Area) for a humane harvest.

.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.

.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.

 Ammunition manufactured today for .243 Winchester rifles offer deer hunters plenty of great options to get top 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: 200 Yard Zero.
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.
225 yds.
250 yds.
275 yds.
Yards
Bullet Velocity:
3,050
2,811
2,585
2,530
2,476
2,423
FPS.
Bullet Energy:
1,962
1,667
1,409
1,350
1,293
1,238
FT. LBS.
Bullet Trajectory:
- 1.5"
+ 1.5"
0"
- 1.1"
- 2.6"
- 4.5"
IN.
1 In 10" Twist:
3,660
3,373
3,102
3,036
2,971
2,907
R.P.S.
1 In 9" Twist:
4,066
3,748
3,446
3,373
3,301
3,230
R.P.S.


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