Drawbacks of a carbine?

I can't wait til I get it its scheduled to arrive on monday. All of this is just plans of course, it may just stay as it is if it feels just right...if not its tweak time. The plan is synthetic stocks, pistol grip on the rear, bipod on the front, cut to carbine with a Nikkon ProStaff 3-9x50 scope with a ballistic drop retical.
The stock and scope are almost a gurantee as I don't want to take the nice condition wood stocks threw the bush.
 
"...a few FPS..." It's more than a few. Roughly 100 fps per inch. The muzzle blast and flash significantly increases too.
 
sunray said:
"...a few FPS..." It's more than a few. Roughly 100 fps per inch. The muzzle blast and flash significantly increases too.
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Sorry Sunray, I generally get a reduction of up to 30 fps per inch, I personally have never seen a 100fps reduction per inch nor have I heard (reliably) of such.

And I stress "up to", I have had less then 20 fps reduction, though to be fair I have never docked more than six inches off any given barrel.
 
When I shortened the barrel from 24.75" to 21"on my 9.3X62, the velocity loss per inch was a minimum of 15 fps up a max of 40 fps, depending on bullet and powder combinations.

Changes to muzzle blast, muzzle jump and recoil was not noticeable.
 
sunray said:
"...a few FPS..." It's more than a few. Roughly 100 fps per inch. The muzzle blast and flash significantly increases too.
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facepalm.gif



a student of Chuck Hawks i see :runaway:
seeing as the legal limit is 18.5" you wont even be losing 25fps per inch.
 
Now I just have to have my 300 cut to 20 inch,when I can I will post results.I have chrony data before and I will shoot the same load and post it.
Sunray has officially graduated from the Chuck "Horse Pucky" Hawks school of internet gunrag writing.:slap:
 
some article linked from snipercountry i read awhile back, i cant find the damned thing again but i remember the results clearly.

Federal Match @2600fps isnt exactly high velocity ammo.
i dont find it hard to believe that there would be minimal velocity reduction from 26-20" in a non-magnum like a .308. it probably lost a few fps but they didnt bother to record it since ammo fluctuates a little anyway. i doubt they went through all the trouble of cutting and crowning a heavy barrel a dozen times just to lie about the results :rolleyes:
 
manbearpig said:
some article linked from snipercountry i read awhile back, i cant find the damned thing again but i remember the results clearly.

Federal Match @2600fps isnt exactly high velocity ammo.
i dont find it hard to believe that there would be minimal velocity reduction from 26-20" in a non-magnum like a .308. it probably lost a few fps but they didnt bother to record it since ammo fluctuates a little anyway. i doubt they went through all the trouble of cutting and crowning a heavy barrel a dozen times just to lie about the results :rolleyes:
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Huh, I guess the velocity loss I have noticed with all the barrels I have had cut down and re crowned must have been just me then.

What is your experience with chopping down rifle barrels?
 
are you trying to say that every single inch you chop off a rifle barrel - whether its from 26-25 or from 19-18 will give the same reduction in velocity?
there is a certain barrel length for every cartridge beyond which velocity is largely unaffected. there are diminishing returns on barrel length, otherwise wed see varmint rifles with 50" barrels.

you havent posted any numbers other than to say 'there is always some velocity loss'. great, that could be 10-15 fps which most people wouldnt bother to record.
perhaps with the relatively tame match ammo in a .308 there wasnt enough of a noticeable velocity loss from 26-20". they did (obviously) record drops in 20-18, 18-16 and below 16" velocity loss was far more dramatic.

until you post specific results relevant to the .308 you have no point, and are just trolling.
 
Just what I thought, you have never played with barrel lengths and a chronograph to find out what happens in the real world :rolleyes:

I am not going to waste my time going through all of my reloading data just for you. I DO know velocity has been effected on every gun I have ever chopped the barrel on. Chop a barrel from 26" to 20" and find out for yourself.

Just because you read some article on the interweb it must be true...

Good night Chuck Hawks :wave:
 
I read an article in Handloader about Phil Sharpe, who cut down a 30-06 Springfield with a 36" barrel, one inch at a time, testing a staggering variety of ammo....Probably the most exhaustive test done on this topic.

Great velocity loss didn't start until the barrel started to get real short, like 17-18"

There was some from 36 to 20 of course, just not alot, and in some cases velocity went UP in the shorter barrel...:runaway:
 
crazy_davey said:
Just because you read some article on the interweb it must be true...
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seeing as a) it makes sense and b) you havent posted any actual conflicting data, yeah. feel free to change my mind at any time by posting something other than your typical smartass remarks.

'how much, in the .308 specifically?'
___________insert personal insults here, yadda yadda
'how much, in the .308 specifically?'
'im not going to waste my time going through all my reloading data just for you'
thanks for coming out.
 
manbearpig said:
seeing as a) it makes sense and b) you havent posted any actual conflicting data, yeah. feel free to change my mind at any time by posting something other than your typical smartass remarks.

'how much, in the .308 specifically?'
___________insert personal insults here, yadda yadda
'how much, in the .308 specifically?'
'im not going to waste my time going through all my reloading data just for you'
thanks for coming out.
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Feel free to post any of your personal experience with having barrels cut down at any time, other than something you read on the internet. At that time I will be more than willing to go dig up data for you.

If you want data already posted in this thread, I have the exact same rifle as Geologist, barrel chopped to the same length as well. With 300g TSX's loaded to the t**s I lost 25fps for every inch chopped off the barrel, this I know for a fact as it is fresh in my mind. Now that might not be significant to the animal getting hit, but the loss was there in any case.

Chop a .308 from 26" to 20" and there will be velocity lost, guaranteed.

Wasted enough time with this, gotta hit the reloading room. I have test loads to fire in the morn, and then off to the smith my Ti goes to get 2" lobbed off the barrel. More real world testing :runaway:. I don't know why I waste my time when everything I need, Manbearpig already knows from what he read on the web...
 
you had a .375 H&H Magnum cut down...
facepalm.gif

HTF is this relevant to a .308?

Chop a .308 from 26" to 20" and there will be velocity lost, guaranteed.
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150? 1-2? 10? a couple doesnt count, the entire point was that there was no notable FPS lost in the .308 until you go under 20" with match ammo. you called them 'full of sh!t', yet you still havent posted a shred of fact to prove otherwise.
how much?

Feel free to post any of your personal experience with having barrels cut down at any time, other than something you read on the internet. At that time I will be more than willing to go dig up data for you.
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feel free to post your .308 barrel cutting experience, which is what you are arguing about.
 
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