Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Hunting > Long Range Hunting & Shooting

Long Range Hunting & Shooting Nightforce Optics


Reply

Cutting down barrel to 18 myth?

 
LinkBack Thread Tools Display Modes
  #1  
Old 09-15-2009, 06:33 PM
Junior Member
 
Join Date: Sep 2009
Posts: 27
Cutting down barrel to 18 myth?

So ive been reading more and more about GPS Defense cutting down their 308 rifles to 18. So my ques is: what other calibers can you cut the barrel down to 18 without considerable lose in accuracy or FPS. Also are they cutting down factory barrels or aftermarket?

Also i found a website the other day that started at 24 and ended at 10 barrel length. It also showed the FPS table for every inch cut off. But i dont rem the caliber.

Last edited by bvmoney; 09-15-2009 at 06:37 PM.
Reply With Quote
  #2  
Old 09-15-2009, 11:52 PM
SPONSOR
 
Join Date: Jun 2007
Location: Wyoming
Posts: 2,688
Re: Cutting down barrel to 18 myth?

Quote:
Originally Posted by bvmoney View Post
So ive been reading more and more about GPS Defense cutting down their 308 rifles to 18. So my ques is: what other calibers can you cut the barrel down to 18 without considerable lose in accuracy or FPS. Also are they cutting down factory barrels or aftermarket?

Also i found a website the other day that started at 24 and ended at 10 barrel length. It also showed the FPS table for every inch cut off. But i dont rem the caliber.

First, Welcome to LRH!
I hunt and shoot almost exclusively with specialty pistols-Primarily single-shot handguns chambered in rifle cartridges.
250 Sav AI, 6mm-6.5x47Lapua, 6-284, 6.5-284, 284 Win, 7mm Rem Mag Imp, & 7mm Dakota.
My barrel lengths will run from 14"-18"
With my 17-18 inch barrels I will see about 200-300 fps difference (depends on cartridge for one) compared to typical rifle lengths (whatever that is)
For instance with two different 17" 6.5-284's using 140's MV's run from 2700-2775. An 18" (140 grain A-Max) runs @ 2725. I go for the accurate load, not the fastest load.
Accuracy is not an issue for these short barrel rigs if you use quality, prepare everything correctly, and as long as what is going on between yours ears is good you will hit your target
Reply With Quote
  #3  
Old 09-15-2009, 11:58 PM
Junior Member
 
Join Date: Sep 2009
Posts: 27
Re: Cutting down barrel to 18 myth?

Thanks for the welcome.

Learn me on this 7mm mag imp please. Ive never heard of that before.

Also if what your telling me is correct, id like to use a 7mm mag but with a shorter barrel. Im not worried about loosing FPS as much as i am knock down energy. But my research has shown that anything in a magnum under 24 barrel burns/wastes to much powder. So how could you shoot a mag out of a 17-18 barrel? Isnt it a waste?

Thanks for the knowledge.
Reply With Quote
  #4  
Old 09-16-2009, 12:13 AM
SPONSOR
 
Join Date: Jun 2007
Location: Wyoming
Posts: 2,688
Re: Cutting down barrel to 18 myth?

Quote:
Originally Posted by bvmoney View Post
Thanks for the welcome.

Learn me on this 7mm mag imp please. Ive never heard of that before.

Also if what your telling me is correct, id like to use a 7mm mag but with a shorter barrel. Im not worried about loosing FPS as much as i am knock down energy. But my research has shown that anything in a magnum under 24 barrel burns/wastes to much powder. So how could you shoot a mag out of a 17-18 barrel? Isnt it a waste?

Thanks for the knowledge.
The 7mm Rem Mag Imp., is simply an improved 7mm Rem Mag.
The 7mm Dakota is a larger case than the improved 7mm Mag.
Next barrel (18") I will be getting on my center-grip Rem XP-100--It will use upward of 100 grains of powder.
I don't care about wasting powder.
What I do care about is performance and accuracy. With those two things in mind, if I want the performance of the 260 Rem in a regular rifle lengths then I will have to step up to a 6.5-284. Some of my 6.5-284 handgun MV's may be at the max or slightly over what the a 260 rifle gets.

I pretty much look at rifle performance with a given cartridge/bullet in a rifle and then subtract 300 fps and that is pretty close to what I get in one of my SP's.
Reply With Quote
  #5  
Old 09-16-2009, 12:24 AM
Junior Member
 
Join Date: Sep 2009
Posts: 27
Re: Cutting down barrel to 18 myth?

So you could shoot a regular 7mag (not improved) out of a 18 rifle barrel?

Any downside besides loose of FPS?
Reply With Quote
  #6  
Old 09-16-2009, 12:27 AM
SPONSOR
 
Join Date: Jun 2007
Location: Wyoming
Posts: 2,688
Re: Cutting down barrel to 18 myth?

Quote:
Originally Posted by bvmoney View Post
Thanks for the welcome.

Learn me on this 7mm mag imp please. Ive never heard of that before.

Also if what your telling me is correct, id like to use a 7mm mag but with a shorter barrel. Im not worried about loosing FPS as much as i am knock down energy.
What do you mean by knock-down energy?
What kind/weight of bullet are you looking at using?
What would you consider your maximum hunting distance in ideal conditions?
Reply With Quote
  #7  
Old 09-16-2009, 12:29 AM
Junior Member
 
Join Date: Sep 2009
Posts: 27
Re: Cutting down barrel to 18 myth?

Knock down energy- enough energy to drop a deer.

Bullet weight- 140

300 yards max

Living in GA we dont see much beyond that. Most of the time it wont be close to that far. But i wanna be able to reach that far if i have to. I hate limiting myself.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Cutting down barrel to 18 myth?
Thread Thread Starter Forum Replies Last Post
Needed Energy for killing.... is it a myth?? *WyoWhisper* Rifles, Bullets, Barrels & Ballistics 57 07-27-2012 09:38 PM
Limbsaver Barrel De-resonator...myth? 25792SP Long Range Hunting & Shooting 6 08-05-2009 07:45 AM
damage to bore by cleaning rod: Myth or reallity buck5611 Long Range Hunting & Shooting 9 01-16-2009 08:35 PM
Bullet stabilization myth? drenge Rifles, Bullets, Barrels & Ballistics 35 07-02-2008 10:48 PM
cutting new 7-30 water barrel hunlee Specialty Handgun Hunting 1 02-01-2008 04:04 PM


All times are GMT -5. The time now is 03:50 AM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC