barrel velocity ?
- Thread starter Westex
- Start date
Barrel (bore) diameter.
Last edited:
As in bore diameter?
Yup and whether, Polished / Lapped ( and "Broke in" ),.. "Well"
Yes sir ,,,,,^^^^^^
Length ,,,,,, too long or too short
How tight / loose the bore is ,,,,, or too tight or too loose
How the finish is in the bore ,,,,,, or too smooth or too rough
Barrels are crazy , not apples to apples , all of these above have to work together and in harmony so the little lead slug comes out of the muzzle happy
Length ,,,,,, too long or too short
How tight / loose the bore is ,,,,, or too tight or too loose
How the finish is in the bore ,,,,,, or too smooth or too rough
Barrels are crazy , not apples to apples , all of these above have to work together and in harmony so the little lead slug comes out of the muzzle happy
Many shooters mistakenly assume that barrel length and average MV always have a direct and consistent relationship. Two barrels of the same length can easily have different average MVs with the same ammo. A longer rifle barrel may shoot faster than a shorter one.
Bore characteristics are what makes one barrel faster or slower than another. Length is only one factor determining how fast bullets pass through the barrel. Among other important characteristics are bore concentricity through its length (how the "roundness" of the bore may vary), bore diameter consistency through its length, and bore "smoothness".
Bores are not always perfectly round or equally round throughout. Bores often don't have the same diameter throughout, which is a reason for slugging the bore before determining where to cut the muzzle. Some bores are rougher or smoother than others, which influences friction between the bore and bullet.
Bore characteristics are what makes one barrel faster or slower than another. Length is only one factor determining how fast bullets pass through the barrel. Among other important characteristics are bore concentricity through its length (how the "roundness" of the bore may vary), bore diameter consistency through its length, and bore "smoothness".
Bores are not always perfectly round or equally round throughout. Bores often don't have the same diameter throughout, which is a reason for slugging the bore before determining where to cut the muzzle. Some bores are rougher or smoother than others, which influences friction between the bore and bullet.
10XSHOOTER
Gold $$ Contributor
Daaaa! your Lilja barrel is 2 " longer than your Shilen
Barrel!
Barrel!
TRSR8
Silver $$ Contributor
All well and true.
One additional factor that often is overlooked…….how well and how early a bore seals the slug without blow by.
Barrels are a science onto themselves and there is simply no telling what the actual results will be in accuracy or velocity. Far too many variables are involved in this as well as some "black magic". The universal thought is that a longer barrel will yield greater velocity and more accuracy, but that is not the case many times. A rimfire barrel muddies the waters even more because so much emphasis is placed on quality ammunition. A center fire shooter can adjust his ammunition via reloading, but not so for rimfire. There are some videos out there that show testers cutting off a barrel an inch at a time to see what happens. The results can be quite interesting. There are also some videos where testing is done with different action screw torque and those are also very informative.
Rick H.
Rick H.
Given what gets posted on many forums -- which is often misinformed -- if there is a universal thought with regard to .22LR, longer barrels will yield less velocity than shorter ones on rifles.
Here, however, the conventional wisdom is not well informed, as barrel length is only one factor involved. In fact, rifle barrel length is not consistent with average velocities, regardless of length. Bore characteristics are a major factor in determining how fast or slow a barrel might be.
No , not necessarily,
You could almost write a small book on the questions you’ve asked , and I’m not qualified , lol
Tight enough to seal the bullet but not so tight that it slowing the bullet down
That is the theory of why some long barrels are faster than their shorter counterparts , you ended up testing a short barrel loose bore against a long barrel tight bore .
See how the testing can get misconstrued one way ?
Everything would have to be tested , gauged , measured ,,,,,,,,
jrb06
Gold $$ Contributor
So is there a general consensus or data in 22lr that shows at what length you start to loose velocity? 18", 20", 22"? As many others have seen, answers are all over the place but is 18-20 the norm for accuracy? Now this FPS loss may not directly corollate to loss of accuracy at 50 yards but what about beyond?
It is deep hole to go down but just putting it out there.
It is deep hole to go down but just putting it out there.
Twist , bore diameter , number of grooves , length of barrel , contour all come into play in my experience
Once again , depending on the barrel , talking to someone in the industry that tested extensively the average best was about 22”
jrb06
Gold $$ Contributor
Was that average best the accuracy or velocity?
Liven The Dream
Gold $$ Contributor
My what if.
52C 28" Original Barrel CCI Std. Tac 20 shoots clean at 50 and sometimes 100.
457 Lilja 24" Chassis 3oz the works CCI Std 12ga. SK Std at 50 Eley Match 100
Is that Long Barrel 60 + years young the Game Changer ?
52C 28" Original Barrel CCI Std. Tac 20 shoots clean at 50 and sometimes 100.
457 Lilja 24" Chassis 3oz the works CCI Std 12ga. SK Std at 50 Eley Match 100
Is that Long Barrel 60 + years young the Game Changer ?
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