Opitmum Barrel Length For .22 WMR ? - RimfireCentral.com Forums

Go Back   RimfireCentral.com Forums > >

Join Team RFC to remove these ads.
Reply
 
Thread Tools Display Modes
  #1  
Old 03-22-2019, 11:09 AM
Bill T
NRA Member - Click Here To Join!

Join Date: 
Aug 2002
Location: 
Arizona
Posts: 
502
TPC Rating: 
0% (0)
Opitmum Barrel Length For .22 WMR ?



Log in to see fewer ads
What is considered to be the optimum barrel length for obtaining the highest velocity in the .22 WMR cartridge? I have always read that for the .22 L.R. it was 16". And anything over that resulted in lower velocity from bullet friction, due to bullet drag after the powder was consumed in the first 16".

I'm assuming the .22 WMR utilizes a slower burning powder in it's much longer case. Along with it's use of jacketed bullets that require more pressure to engrave the rifling. And therefore requires a barrel length longer than 16". However I can't seem to find too much written about this. There are also many different bullet weights available in .22 WMR. From 40 to 55 grains.

My 80's vintage Marlin Model 883 in .22 WMR has a 22" barrel. I have an older, (circa 80's) Model 60 that also has a 22" barrel. Which is too long for the L.R., but the same length might be better for the WMR. My newer Model 60's are equipped with 18" barrels.
Reply With Quote
  #2  
Old 03-22-2019, 12:29 PM
LtCrunch's Avatar
LtCrunch
US Marines NRA Member - Click Here To Join!

Join Date: 
Oct 2015
Location: 
Colorado
Posts: 
1,497
TPC Rating: 
100% (5)
Looking at "Ballistics by the Inch" the velocities increase well beyond 16" Bill. Wish they showed more than 19"! http://ballisticsbytheinch.com/22mag.html

I can tell you what less than optimal is...that'd be my 1-1/8" barrel North American Arms .22 mag revolver. Most of those keyhole beyond 7 yards or so. Your 22" Marlins sound about perfect.

Frank

Last edited by LtCrunch; 03-22-2019 at 12:45 PM.
Reply With Quote
  #3  
Old 03-22-2019, 01:10 PM
Trabzon
US Air Force Veteran

Join Date: 
Oct 2007
Location: 
Prescott, Arizona
Posts: 
702
TPC Rating: 
0% (0)
And yet, the Ruger Precision Rimfire and American Rimfire target models both have 18 inch barrels. What is that about?
Reply With Quote
 
  #4  
Old 03-22-2019, 03:19 PM
Bill T
NRA Member - Click Here To Join!

Join Date: 
Aug 2002
Location: 
Arizona
Posts: 
502
TPC Rating: 
0% (0)
Quote:
Originally Posted by Trabzon View Post
And yet, the Ruger Precision Rimfire and American Rimfire target models both have 18 inch barrels. What is that about?
Is that for L.R., or Magnum models?
Reply With Quote
  #5  
Old 03-22-2019, 03:24 PM
Bill T
NRA Member - Click Here To Join!

Join Date: 
Aug 2002
Location: 
Arizona
Posts: 
502
TPC Rating: 
0% (0)
Quote:
Originally Posted by LtCrunch View Post
Looking at "Ballistics by the Inch" the velocities increase well beyond 16" Bill. Wish they showed more than 19"! http://ballisticsbytheinch.com/22mag.html

I can tell you what less than optimal is...that'd be my 1-1/8" barrel North American Arms .22 mag revolver. Most of those keyhole beyond 7 yards or so. Your 22" Marlins sound about perfect.

Frank
Thanks for that link. As you said, I don't understand why they stopped at 19" for the .22 Magnum.
Reply With Quote
  #6  
Old 03-22-2019, 09:29 PM
wkd
US Army Veteran

Join Date: 
Jul 2010
Location: 
Illinois
Posts: 
3,397
TPC Rating: 
95% (17)
Quote:
Originally Posted by Bill T View Post
Thanks for that link. As you said, I don't understand why they stopped at 19" for the .22 Magnum.
Because all but the 30 gr loads started to lose velocity after 18 inches.
Reply With Quote
  #7  
Old 03-23-2019, 03:31 AM
Bill T
NRA Member - Click Here To Join!

Join Date: 
Aug 2002
Location: 
Arizona
Posts: 
502
TPC Rating: 
0% (0)
Quote:
Originally Posted by wkd View Post
Because all but the 30 gr loads started to lose velocity after 18 inches.
I've never understood those light bullet weights in Magnum cartridges. .22WMR included. Light projectiles bleed off velocity too fast. The .22 Magnum performs better with 50 grain bullets, than it does with 30. Sure the little screamers come out of the muzzle faster, but look at velocity at 200 yards. The heavy bullets are always traveling faster, and have more energy when they get there. No matter if it's a .22 Mag., or a .300 Weatherby.
Reply With Quote
  #8  
Old 03-23-2019, 01:22 PM
ayetee's Avatar
ayetee
NRA Member - Click Here To Join!

Join Date: 
Aug 2015
Location: 
Henderson
Posts: 
559
TPC Rating: 
100% (25)
Quote:
Originally Posted by Bill T View Post
I've never understood those light bullet weights in Magnum cartridges. .22WMR included. Light projectiles bleed off velocity too fast. The .22 Magnum performs better with 50 grain bullets, than it does with 30. Sure the little screamers come out of the muzzle faster, but look at velocity at 200 yards. The heavy bullets are always traveling faster, and have more energy when they get there. No matter if it's a .22 Mag., or a .300 Weatherby.
Wonder why Roy would load his 300 Weatherby with bullets from 150Gr. to 200Gr.
Reply With Quote
  #9  
Old 03-23-2019, 02:35 PM
Bill T
NRA Member - Click Here To Join!

Join Date: 
Aug 2002
Location: 
Arizona
Posts: 
502
TPC Rating: 
0% (0)
Quote:
Originally Posted by ayetee View Post
Wonder why Roy would load his 300 Weatherby with bullets from 150Gr. to 200Gr.
Muzzle velocity will of course be the highest, and most impressive with the lighter 150 Gr. bullets. But Magnums like the .300 Weatherby and Winchester shine their best at longer ranges from 400 yards and beyond. That is where the heavier bullets really shine, because they hold velocity longer. In all of the 1,000 yard matches, the .300 Magnums were all loaded with heavier bullets from 220 to 250 Gr.

Some people think the heavier bullets automatically produce a rainbow trajectory. But the .375 H&H Magnum with 270 Gr. bullets, shoots just as flat as the .30-06 with 165 Gr. slugs.
Reply With Quote
  #10  
Old 03-23-2019, 03:16 PM
JTJ's Avatar
JTJ
US Air Force Veteran NRA Member - Click Here To Join! GOA Member

Join Date: 
Oct 2012
Location: 
Arizona
Posts: 
1,185
TPC Rating: 
0% (0)
Barrel length varies with the brand and weight of the ammunition. It is all over the place as far as a correct barrel length. 18"-19" seems to be a number for Hornady but not for Fiochi or Federal. 30 grain was peaking in 23" See link below. Note: take a look at the Taurus Circuit Judge numbers.
http://www.ballisticsbytheinch.com/22mag.html
Reply With Quote
  #11  
Old 03-23-2019, 08:48 PM
Bradical
NRA Member - Click Here To Join!

Join Date: 
May 2013
Location: 
Southeast Pennsylvania
Posts: 
1,214
TPC Rating: 
0% (0)
Quote:
Originally Posted by Bill T View Post
I've never understood those light bullet weights in Magnum cartridges. .22WMR included. Light projectiles bleed off velocity too fast. The .22 Magnum performs better with 45 grain bullets, than it does with 30. Sure the little screamers come out of the muzzle faster, but look at velocity at 200 yards. The heavy bullets are always traveling faster, and have more energy when they get there. No matter if it's a .22 Mag., or a .300 Weatherby.
That may be true for center fire cartridges, but rimfire cartridges seem to take more to some rifles better than others. My son's 18" CZ455 prefers the current lot of 30g Hornady. It even likes this lighter round best out to 200 yards.

However, my 24" barreled Mossberg 640K loves the current lot of 45g Critical Defense at all distances.

Go figure.

Last edited by Bradical; 03-25-2019 at 08:24 PM. Reason: Corrected 50g to 45g
Reply With Quote
  #12  
Old 03-23-2019, 10:20 PM
wkd
US Army Veteran

Join Date: 
Jul 2010
Location: 
Illinois
Posts: 
3,397
TPC Rating: 
95% (17)
Quote:
Originally Posted by ayetee View Post
Wonder why Roy would load his 300 Weatherby with bullets from 150Gr. to 200Gr.
Because that was and still is the best bullet weight range for hunting bullets in 30 cal.
Reply With Quote
  #13  
Old 03-24-2019, 04:12 AM
Bill T
NRA Member - Click Here To Join!

Join Date: 
Aug 2002
Location: 
Arizona
Posts: 
502
TPC Rating: 
0% (0)
Quote:
Originally Posted by Bradical View Post
That may be true for center fire cartridges, but rimfire cartridges seem to take more to some rifles better than others. My son's 18" CZ455 prefers the current lot of 30g Hornady. It even likes this lighter round best out to 200 yards.

However, my 24" barreled Mossberg 640K loves the current lot of 50g Critical Defense at all distances.

Go figure.
That makes sense from a powder standpoint. The longer 24" barrel prefers heavy bullets, (50 Grains), because they are no doubt loaded with a much slower burning powder than the 30 Grain Hornady's are. The heavier the bullet, the more slower burning powder it requires for maximum performance and accuracy. And the longer barrel is required for complete powder consumption.
Reply With Quote
  #14  
Old 03-24-2019, 09:54 AM
Bradical
NRA Member - Click Here To Join!

Join Date: 
May 2013
Location: 
Southeast Pennsylvania
Posts: 
1,214
TPC Rating: 
0% (0)
Quote:
Originally Posted by Bill T View Post
That makes sense from a powder standpoint. The longer 24" barrel prefers heavy bullets, (50 Grains), because they are no doubt loaded with a much slower burning powder than the 30 Grain Hornady's are. The heavier the bullet, the more slower burning powder it requires for maximum performance and accuracy. And the longer barrel is required for complete powder consumption.
Not having done any reloading, the speed in which a powder burns never occurred to me as a factor. But, now that you've pointed it out, it makes sense that it could. They're both Hornady cartridges. It'd be interesting to know if they do use different propellents.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mossberg 42MB/(a) SN survey sakorick Mossberg 85 12-07-2018 01:56 PM
69a 22AGS Winchester 94 12-10-2017 06:36 PM
.22 Barrel length effeciency question Drill Sergeant Open Rimfire 20 03-28-2017 07:52 PM
CZ barrel length - interesting little test. Danny Creasy CZ / Brno 33 10-08-2016 07:52 PM
Exterior Ballistics -- A Primer Sophia Open Rimfire 34 12-31-2007 07:44 AM



All times are GMT -5. The time now is 02:42 AM.

Privacy Policy

DMCA Notice

Powered by vBulletin
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Search Engine Optimisation provided by DragonByte SEO (Lite) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright 2000-2018 RimfireCentral.com
x