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#Post#: 23924--------------------------------------------------
Low weight bullets for .222/.223
By: babbyc1000 Date: February 26, 2014, 5:33 pm
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Just working out a few new loads for the .222 (currently using
55g hollow points around 2800fps) but I've seen some loads that
have caught my eye, showing 30 grain bullets being put out at
3800 fps :o
Has anyone any experience with bullets this light? Ballistic
data looks good, especially for longer range shots, seem quite
flat shooting and pack a punch, tho might be a barrel burner
going at those speeds :-\
#Post#: 24182--------------------------------------------------
Re: Low weight bullets for .222/.223
By: GEOFF.223 Date: March 4, 2014, 5:32 am
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Waa reading about the light bullets for .223 30gr and 39gr and
people were concerned about barrel burn out.
And there were a few boys saying after 1500 rounds accuracy will
go slightly but if It was a hunting rifle not enough to be
bothered about.
Same as .22-250 probably 50000 rounds and there junk supposably.
Target guys say they notice a lose of accuracy around 1000
rounds and thats big ass rounds going alot slower but they are
getting one hole groups at 600yards :o
#Post#: 24314--------------------------------------------------
Re: Low weight bullets for .222/.223
By: Al Dunn Date: March 6, 2014, 2:33 am
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I can't understand why there would be throat erosion problems
with using light bullets in a .223.
The .223 case has a limited capacity compared to the likes of
.22-250, therefore you'll not be using anymore powder to power a
30gn bullet than you'll be using to send a 60gn bullet down
range - both bullets can be loaded to be compressed loads in
.223. With this in mind, how can a 30gn be any more of a barrel
burner than a 60gn?
It's nothing to do with speed, as copper as we all know is a
natural lubricant.
Interested to hear your reasoning, Geoff.
Al.
#Post#: 24320--------------------------------------------------
Re: Low weight bullets for .222/.223
By: GEOFF.223 Date: March 6, 2014, 7:47 am
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This is just a guess so be skeptical
It's not just the projectile that's going faster the gases will
be as well putting more pressure and wear on the barrel.
We have water jet machines in work that can cut though 65mm
steel plates so if simple water solution will cut through steel
like a . 50 bmg going through a talibans head.
Then what chances does a little rifle barrel have to extremely
hot gas going super sonic speeds?
#Post#: 24321--------------------------------------------------
Re: Low weight bullets for .222/.223
By: GEOFF.223 Date: March 6, 2014, 7:49 am
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What ever metal compounds are used in rifle they just don't like
getting near that 4000fps kind of speeds.
#Post#: 24323--------------------------------------------------
Re: Low weight bullets for .222/.223
By: Al Dunn Date: March 6, 2014, 8:21 am
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Velocity has nothing to do with it, nor has metal compound
(whatever that is?) Most barrels are made from a molybdenum
steel, which tends to be quite hard.
A barrel will 'burn out' due to the heat being created by the
burn of the powder, so if a 30gn bullet uses the same amount of
powder as a heavier bullet, why would the barrel burn out any
faster with light fast bullets than heavy slower ones?
The copper on a bullet's jacket is considerably softer than a
barrel. The aforementioned .22-250 uses upwards of 40gns of
powder, hence the limited barrel life found in this calibre.
Al.
#Post#: 24330--------------------------------------------------
Re: Low weight bullets for .222/.223
By: babbyc1000 Date: March 6, 2014, 10:28 am
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So does that mean 22-250's burn out because there's more powder
and not because of the speed? Tbh I'd always assumed the speed
did the damage, eg throwing a wet sponge at someone does no
damage, but throw one at 500mph and they're screwed... Ok poor
example but you know what I mean lol
#Post#: 24331--------------------------------------------------
Re: Low weight bullets for .222/.223
By: Al Dunn Date: March 6, 2014, 11:01 am
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Hi Babby, the throat will normally be the first part of the
barrel to go, and this is followed normally by firecracking just
forward of the throat. Both these problems are associated with
(excessive) heat and are what causes the barrel to lose its
accuracy, long before any wear occurs in the rifling.
The above assumes, of course, that the barrel has been
otherwise looked after as regards proper cleaning etc
Al.
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