Results 11 to 20 of 21
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03-07-2020, 13:33 #11
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- Feb 2011
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Re: .22LR Barrel length reduction chrono results
Thank you for posting this, I think I'll be chopping my barrel when the rifle comes home.
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03-07-2020, 13:37 #12
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- Dec 2010
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- Boland
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03-07-2020, 15:39 #13
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- Mar 2011
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- West Rand, Gauteng
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- 74
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Re: .22LR Barrel length reduction chrono results
I got the barrel of my BRNO no.2 chopped to 16" a few years ago after reading up on velocities etc. Now shoots even better than before and I get one hole groups at 50m with Highland AX standard velocity ammo. I've always lover her, just more now!
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03-07-2020, 15:48 #14
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- Nov 2010
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- George, Western Cape
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- 48
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- 1,046
Re: .22LR Barrel length reduction chrono results
Just be careful. Some rifle barrels are "tightened" at the end if you chop that off it loses accuracy.
Make sure before you chop your rifles barrel
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03-07-2020, 22:11 #15
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- Oct 2012
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- Noord van die biltong gordyn.
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- 56
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Re: .22LR Barrel length reduction chrono results
Both notions are without any scientific foundations.
The bullets won't stop spinning when leaving the rifling. In fact, with the linear velocity increase, the rotational velocity increases proportionally.
And the powder stops burning quite a bit before 16" of bullet travel. That is only the point where peak velocity is reached. After that, the gas pressure behind the bullet is less than the barrel friction, so the bullet loses velocity again. You will still find some unburned powder granules in your supressor, no matter how long the barrel is.
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03-07-2020, 23:21 #16
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- Aug 2012
- Location
- Stella
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- 46
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- 10,870
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04-07-2020, 08:45 #17
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- Apr 2019
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- Cape Town
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- 1,784
Re: .22LR Barrel length reduction chrono results
If the bullet comes out the end and you hear a report, it means that there is still quite a bit of pressure behind it. Pressure means acceleration. That is why I was expecting SV and HV ammunition to have higher velocity with a 21".
Hence my question about cleaning the barrel.
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04-07-2020, 17:26 #18
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- Feb 2011
- Location
- Western Cape
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- 3,403
Re: .22LR Barrel length reduction chrono results
There isn't really any reasons to quote 16" or powder burn rate. The chart by Leerie shows that some are better at shorter lengths and some are better at who knows- the chart stops at 18". If you spend as much time as a jobless wanker behind the computer you will realize that not even the bullet matters, some people are getting different results at the same length.
So pick what you like and please remember Peashooter's advice. Many of the target rifles have a choke point lapped in just before the muzzle.
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04-07-2020, 17:30 #19
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- Feb 2012
- Location
- Pretoria
- Posts
- 3,327
Re: .22LR Barrel length reduction chrono results
The few tests with standard rifles having the barrel cut down showed very similar results on another rimfire forum. I came across the choke phenomenon as well but there was no definite answer with regards to CZ or Ruger having the barrels tapered.
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05-07-2020, 07:39 #20
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- Feb 2015
- Location
- Cape Town
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- 42
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- 482
Re: .22LR Barrel length reduction chrono results
Out of interest, what is the average barrel length of .22 benchrest rifles?
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